Revert "Add Ganesh support for RGBA_16161616 and RG_half"

This reverts commit 156622513ffc385bb493eda8d4cf5cbed19350d1.

Reason for revert: valgrind

Original change's description:
> Add Ganesh support for RGBA_16161616 and RG_half
> 
> Change-Id: Ia424ff719c5fb8d1842a909ade09ad6f5f78f21f
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/219998
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>

TBR=egdaniel@google.com,robertphillips@google.com

Change-Id: I7a8e99e70f575fb301ce289d9a04ebbec25b934b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/220739
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/include/private/GrTypesPriv.h b/include/private/GrTypesPriv.h
index b2aed34..4d187ea 100644
--- a/include/private/GrTypesPriv.h
+++ b/include/private/GrTypesPriv.h
@@ -59,14 +59,12 @@
     kRGBA_half_GrPixelConfig,
     kRGBA_half_Clamped_GrPixelConfig,
     kRGB_ETC1_GrPixelConfig,
+
+    // Experimental (for P016 and P010)
     kR_16_GrPixelConfig,
     kRG_1616_GrPixelConfig,
 
-    // Experimental (for Y416 and mutant P016/P010)
-    kRGBA_16161616_GrPixelConfig,
-    kRG_half_GrPixelConfig,
-
-    kLast_GrPixelConfig = kRG_half_GrPixelConfig
+    kLast_GrPixelConfig = kRG_1616_GrPixelConfig
 };
 static const int kGrPixelConfigCnt = kLast_GrPixelConfig + 1;
 
@@ -691,12 +689,10 @@
     kInt_GrVertexAttribType,
     kUint_GrVertexAttribType,
 
+    // Experimental (for P016 and P010)
     kUShort_norm_GrVertexAttribType,
 
-    // Experimental (for Y416)
-    kUShort4_norm_GrVertexAttribType, // vector of 4 unsigned shorts. 0 -> 0.0f, 65535 -> 1.0f.
-
-    kLast_GrVertexAttribType = kUShort4_norm_GrVertexAttribType
+    kLast_GrVertexAttribType = kUShort_norm_GrVertexAttribType
 };
 static const int kGrVertexAttribTypeCount = kLast_GrVertexAttribType + 1;
 
@@ -902,11 +898,9 @@
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
         case kRGB_ETC1_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-        case kRG_half_GrPixelConfig:
             return GrSRGBEncoded::kNo;
     }
     SK_ABORT("Invalid pixel config");
@@ -931,7 +925,6 @@
         case kRG_88_GrPixelConfig:
         case kAlpha_half_GrPixelConfig:
         case kAlpha_half_as_Red_GrPixelConfig:
-        case kR_16_GrPixelConfig:
             return 2;
         case kRGBA_8888_GrPixelConfig:
         case kRGB_888_GrPixelConfig:  // Assuming GPUs store this 4-byte aligned.
@@ -940,7 +933,6 @@
         case kSRGBA_8888_GrPixelConfig:
         case kSBGRA_8888_GrPixelConfig:
         case kRGBA_1010102_GrPixelConfig:
-        case kRG_1616_GrPixelConfig:
             return 4;
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
@@ -953,10 +945,10 @@
         case kRGB_ETC1_GrPixelConfig:
             return 0;
 
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            return 8;
-        case kRG_half_GrPixelConfig:
+        // Experimental (for P016 and P010)
+        case kR_16_GrPixelConfig:
+            return 2;
+        case kRG_1616_GrPixelConfig:
             return 4;
     }
     SK_ABORT("Invalid pixel config");
@@ -974,9 +966,9 @@
         case kGray_8_as_Red_GrPixelConfig:
         case kRG_float_GrPixelConfig:
         case kRGB_ETC1_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        case kRG_half_GrPixelConfig: // Experimental (for mutant P016/P010)
             return true;
         case kAlpha_8_GrPixelConfig:
         case kAlpha_8_as_Alpha_GrPixelConfig:
@@ -992,7 +984,6 @@
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
         case kRGBA_float_GrPixelConfig:
-        case kRGBA_16161616_GrPixelConfig: // Experimental (for Y416)
         case kUnknown_GrPixelConfig:
             return false;
     }
@@ -1027,11 +1018,9 @@
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
         case kRGB_ETC1_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-        case kRG_half_GrPixelConfig:
             return false;
     }
     SK_ABORT("Invalid pixel config.");
@@ -1058,9 +1047,9 @@
         case kSBGRA_8888_GrPixelConfig:
         case kRGBA_1010102_GrPixelConfig:
         case kRGB_ETC1_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        case kRGBA_16161616_GrPixelConfig: // Experimental (for Y416)
             return false;
         case kRGBA_float_GrPixelConfig:
         case kRG_float_GrPixelConfig:
@@ -1068,7 +1057,6 @@
         case kAlpha_half_as_Red_GrPixelConfig:
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
-        case kRG_half_GrPixelConfig: // Experimental (for mutant P016/P010)
             return true;
     }
     SK_ABORT("Invalid pixel config.");
@@ -1164,11 +1152,9 @@
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
         case kRGBA_1010102_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-        case kRG_half_GrPixelConfig:
             return kMedium_GrSLPrecision;
     }
     SK_ABORT("Unexpected type");
@@ -1198,14 +1184,11 @@
     kRGBA_F16_Clamped,
     kRG_F32,
     kRGBA_F32,
-    kRGB_ETC1,      // Not in SkColorType
+    kRGB_ETC1,   // This type doesn't appear in SkColorType at all.
 
-    kR_16,          // Not in SkColorType
-    kRG_1616,       // Not in SkColorType
-
-    // Experimental (for Y416 and mutant P016/P010)
-    kRGBA_16161616, // Not in SkColorType
-    kRG_half,       // Not in SkColorType
+    // Experimental (for P016 and P010)
+    kR_16,       // Not in SkColorType
+    kRG_1616,    // Not in SkColorType
 };
 
 static inline SkColorType GrColorTypeToSkColorType(GrColorType ct) {
@@ -1226,11 +1209,9 @@
         case GrColorType::kRG_F32:           return kUnknown_SkColorType;
         case GrColorType::kRGBA_F32:         return kRGBA_F32_SkColorType;
         case GrColorType::kRGB_ETC1:         return kUnknown_SkColorType;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:             return kUnknown_SkColorType;
         case GrColorType::kRG_1616:          return kUnknown_SkColorType;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:    return kUnknown_SkColorType;
-        case GrColorType::kRG_half:          return kUnknown_SkColorType;
     }
     SK_ABORT("Invalid GrColorType");
     return kUnknown_SkColorType;
@@ -1276,13 +1257,10 @@
                                                     kGreen_SkColorTypeComponentFlag;
         case GrColorType::kRGBA_F32:         return kRGBA_SkColorTypeComponentFlags;
         case GrColorType::kRGB_ETC1:         return kRGB_SkColorTypeComponentFlags;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:             return kRed_SkColorTypeComponentFlag;
         case GrColorType::kRG_1616:          return kRed_SkColorTypeComponentFlag |
                                                     kGreen_SkColorTypeComponentFlag;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:    return kRGBA_SkColorTypeComponentFlags;
-        case GrColorType::kRG_half:          return kRed_SkColorTypeComponentFlag |
-                                                    kGreen_SkColorTypeComponentFlag;
     }
     SK_ABORT("Invalid GrColorType");
     return kUnknown_SkColorType;
@@ -1314,11 +1292,9 @@
         case GrColorType::kRGBA_F16_Clamped: return 8;
         case GrColorType::kRG_F32:           return 8;
         case GrColorType::kRGBA_F32:         return 16;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:             return 2;
         case GrColorType::kRG_1616:          return 4;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:    return 8;
-        case GrColorType::kRG_half:          return 4;
     }
     SK_ABORT("Invalid GrColorType");
     return 0;
@@ -1399,6 +1375,7 @@
         case kGray_8_as_Red_GrPixelConfig:
             *srgbEncoded = GrSRGBEncoded::kNo;
             return GrColorType::kGray_8;
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
             *srgbEncoded = GrSRGBEncoded::kNo;
             return GrColorType::kR_16;
@@ -1406,13 +1383,6 @@
             *srgbEncoded = GrSRGBEncoded::kNo;
             return GrColorType::kRG_1616;
 
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            *srgbEncoded = GrSRGBEncoded::kNo;
-            return GrColorType::kRGBA_16161616;
-        case kRG_half_GrPixelConfig:
-            *srgbEncoded = GrSRGBEncoded::kNo;
-            return GrColorType::kRG_half;
     }
     SK_ABORT("Invalid GrPixelConfig");
     return GrColorType::kUnknown;
@@ -1487,20 +1457,13 @@
             return (GrSRGBEncoded::kYes == srgbEncoded) ? kUnknown_GrPixelConfig
                                                         : kRGB_ETC1_GrPixelConfig;
 
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:
             return (GrSRGBEncoded::kYes == srgbEncoded) ? kUnknown_GrPixelConfig
                                                         : kR_16_GrPixelConfig;
         case GrColorType::kRG_1616:
             return (GrSRGBEncoded::kYes == srgbEncoded) ? kUnknown_GrPixelConfig
                                                         : kRG_1616_GrPixelConfig;
-
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:
-            return (GrSRGBEncoded::kYes == srgbEncoded) ? kUnknown_GrPixelConfig
-                                                        : kRGBA_16161616_GrPixelConfig;
-        case GrColorType::kRG_half:
-            return (GrSRGBEncoded::kYes == srgbEncoded) ? kUnknown_GrPixelConfig
-                                                        : kRG_half_GrPixelConfig;
     }
     SK_ABORT("Invalid GrColorType");
     return kUnknown_GrPixelConfig;
diff --git a/src/gpu/GrCaps.cpp b/src/gpu/GrCaps.cpp
index 1b19d7e..adcedb6 100644
--- a/src/gpu/GrCaps.cpp
+++ b/src/gpu/GrCaps.cpp
@@ -148,11 +148,9 @@
         case kRGBA_half_GrPixelConfig: return "RGBAHalf";
         case kRGBA_half_Clamped_GrPixelConfig: return "RGBAHalfClamped";
         case kRGB_ETC1_GrPixelConfig: return "RGBETC1";
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig: return "R16";
         case kRG_1616_GrPixelConfig: return "RG1616";
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig: return "RGBA16161616";
-        case kRG_half_GrPixelConfig: return "RGHalf";
     }
     SK_ABORT("Invalid pixel config");
     return "<invalid>";
diff --git a/src/gpu/GrDataUtils.cpp b/src/gpu/GrDataUtils.cpp
index 63418a0..965251e 100644
--- a/src/gpu/GrDataUtils.cpp
+++ b/src/gpu/GrDataUtils.cpp
@@ -262,6 +262,7 @@
             sk_memset64((uint64_t *) dest, rgbaHalf, width * height);
             break;
         }
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig: {
             uint16_t r16 = SkScalarRoundToInt(colorf.fR * 65535.0f);
             sk_memset16((uint16_t*) dest, r16, width * height);
@@ -276,26 +277,6 @@
             sk_memset32((uint32_t*) dest, rg1616, width * height);
             break;
         }
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig: {
-            uint64_t r16 = SkScalarRoundToInt(colorf.fR * 65535.0f);
-            uint64_t g16 = SkScalarRoundToInt(colorf.fG * 65535.0f);
-            uint64_t b16 = SkScalarRoundToInt(colorf.fB * 65535.0f);
-            uint64_t a16 = SkScalarRoundToInt(colorf.fA * 65535.0f);
-
-            uint64_t rgba16161616 = (a16 << 48) | (b16 << 32) | (g16 << 16) | r16;
-            sk_memset64((uint64_t*) dest, rgba16161616, width * height);
-            break;
-        }
-        case kRG_half_GrPixelConfig: {
-            uint32_t rHalf = SkFloatToHalf(colorf.fR);
-            uint32_t gHalf = SkFloatToHalf(colorf.fG);
-
-            uint32_t rgHalf = (rHalf << 16) | gHalf;
-
-            sk_memset32((uint32_t *) dest, rgHalf, width * height);
-            break;
-        }
         default:
             return false;
             break;
diff --git a/src/gpu/GrPrimitiveProcessor.h b/src/gpu/GrPrimitiveProcessor.h
index 49b6277..a5fc8be 100644
--- a/src/gpu/GrPrimitiveProcessor.h
+++ b/src/gpu/GrPrimitiveProcessor.h
@@ -353,11 +353,9 @@
             return sizeof(int32_t);
         case kUint_GrVertexAttribType:
             return sizeof(uint32_t);
+        // Experimental (for P016 and P010)
         case kUShort_norm_GrVertexAttribType:
             return sizeof(uint16_t);
-        // Experimental (for Y416)
-        case kUShort4_norm_GrVertexAttribType:
-            return 4 * sizeof(uint16_t);
     }
     // GCC fails because SK_ABORT evaluates to non constexpr. clang and cl.exe think this is
     // unreachable and don't complain.
diff --git a/src/gpu/GrSurfaceContext.cpp b/src/gpu/GrSurfaceContext.cpp
index 32048c3..71113b4 100644
--- a/src/gpu/GrSurfaceContext.cpp
+++ b/src/gpu/GrSurfaceContext.cpp
@@ -72,11 +72,9 @@
         case GrColorType::kRG_F32:           return false;
         case GrColorType::kRGBA_F32:         return true;
         case GrColorType::kRGB_ETC1:         return false;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:             return false;
         case GrColorType::kRG_1616:          return false;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:    return false;
-        case GrColorType::kRG_half:          return false;
     }
     SK_ABORT("Invalid GrColorType");
     return false;
@@ -110,11 +108,9 @@
         case kAlpha_half_as_Red_GrPixelConfig:  return false;
         case kGray_8_as_Lum_GrPixelConfig:      return false;
         case kGray_8_as_Red_GrPixelConfig:      return false;
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:               return false;
         case kRG_1616_GrPixelConfig:            return false;
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:      return false;
-        case kRG_half_GrPixelConfig:            return false;
     }
     SK_ABORT("Invalid GrPixelConfig");
     return false;
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index 5dae347..911262b 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -296,11 +296,9 @@
         case kRGB_888X_GrPixelConfig:
         case kRG_88_GrPixelConfig:
         case kBGRA_8888_GrPixelConfig:
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
         case kRG_1616_GrPixelConfig:
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-        case kRG_half_GrPixelConfig:
             return 0;
         case kRGB_565_GrPixelConfig:
             return 1;
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index d355208..462ead8 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -1977,7 +1977,6 @@
             // solve many precision issues and no clients actually want this yet.
             // hasFP32RenderTargets = true;
             halfFPRenderTargetSupport = HalfFPRenderTargetSupport::kAll;
-            rgIsTexturable = true;
         } else if (ctxInfo.hasExtension("GL_EXT_color_buffer_half_float")) {
             // This extension only enables half float support rendering for RGBA.
             halfFPRenderTargetSupport = HalfFPRenderTargetSupport::kRGBAOnly;
@@ -2120,7 +2119,7 @@
     } // No WebGL support
     shaderCaps->fConfigTextureSwizzle[kRGB_ETC1_GrPixelConfig] = GrSwizzle::RGBA();
 
-    // 16 bit formats
+    // Experimental (for P016 and P010)
     {
         // For desktop:
         //    GL 3.0 requires support for R16 & RG16
@@ -2139,21 +2138,6 @@
             }
         } // No WebGL support
 
-        // For desktop:
-        //    GL 3.0 requires support for RGBA16
-        // For ES:
-        //    GL_EXT_texture_norm16 adds support but it requires ES 3.1
-        bool rgba16161616Supported = false;
-        if (GR_IS_GR_GL(standard)) {
-            if (version >= GR_GL_VER(3, 0)) {
-                rgba16161616Supported = true;
-            }
-        } else if (GR_IS_GR_GL_ES(standard)) {
-            if (version >= GR_GL_VER(3, 1) && ctxInfo.hasExtension("GL_EXT_texture_norm16")) {
-                rgba16161616Supported = true;
-            }
-        } // No WebGL support
-
         {
             ConfigInfo& r16Info = fConfigTable[kR_16_GrPixelConfig];
 
@@ -2163,7 +2147,7 @@
             r16Info.fFormats.fExternalType = GR_GL_UNSIGNED_SHORT;
             r16Info.fFormatType = kNormalizedFixedPoint_FormatType;
             if (r16AndRG1616Supported) {
-                r16Info.fFlags = ConfigInfo::kTextureable_Flag | allRenderFlags;
+                r16Info.fFlags = ConfigInfo::kTextureable_Flag;
             }
             // We should only ever be sampling the R channel of this format so don't bother
             // with a fancy swizzle.
@@ -2179,53 +2163,14 @@
             rg1616Info.fFormats.fExternalType = GR_GL_UNSIGNED_SHORT;
             rg1616Info.fFormatType = kNormalizedFixedPoint_FormatType;
             if (r16AndRG1616Supported) {
-                rg1616Info.fFlags = ConfigInfo::kTextureable_Flag | allRenderFlags;
+                rg1616Info.fFlags = ConfigInfo::kTextureable_Flag;
             }
             // We should only ever be sampling the R and G channels of this format so don't bother
             // with a fancy swizzle.
             shaderCaps->fConfigTextureSwizzle[kRG_1616_GrPixelConfig] = GrSwizzle::RGBA();
         }
-
-        // Experimental (for Y416)
-        {
-            ConfigInfo& rgba16161616Info = fConfigTable[kRGBA_16161616_GrPixelConfig];
-
-            rgba16161616Info.fFormats.fBaseInternalFormat = GR_GL_RGBA;
-            rgba16161616Info.fFormats.fSizedInternalFormat = GR_GL_RGBA16;
-            rgba16161616Info.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA;
-            rgba16161616Info.fFormats.fExternalType = GR_GL_UNSIGNED_SHORT;
-            rgba16161616Info.fFormatType = kNormalizedFixedPoint_FormatType;
-            if (rgba16161616Supported) {
-                rgba16161616Info.fFlags = ConfigInfo::kTextureable_Flag | allRenderFlags;
-            }
-            shaderCaps->fConfigTextureSwizzle[kRGBA_16161616_GrPixelConfig] = GrSwizzle::RGBA();
-        }
     }
 
-    // Experimental (for Y416 and mutant P016/P010)
-    {
-        ConfigInfo& rgHalf = fConfigTable[kRG_half_GrPixelConfig];
-
-        rgHalf.fFormats.fBaseInternalFormat = GR_GL_RG;
-        rgHalf.fFormats.fSizedInternalFormat = GR_GL_RG16F;
-        rgHalf.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RG;
-        if (GR_IS_GR_GL(standard) || (GR_IS_GR_GL_ES(standard) && version >= GR_GL_VER(3, 0))) {
-            rgHalf.fFormats.fExternalType = GR_GL_HALF_FLOAT;
-        } else {
-            rgHalf.fFormats.fExternalType = GR_GL_HALF_FLOAT_OES;
-        }
-        rgHalf.fFormatType = kFloat_FormatType;
-        if (hasFP16Textures) {
-            rgHalf.fFlags = rgIsTexturable ? ConfigInfo::kTextureable_Flag : 0;
-
-            if (HalfFPRenderTargetSupport::kAll == halfFPRenderTargetSupport) {
-                rgHalf.fFlags |= fpRenderFlags;
-            }
-        }
-        // We should only ever be sampling the R and G channels of this format so don't bother
-        // with a fancy swizzle.
-        shaderCaps->fConfigTextureSwizzle[kRG_half_GrPixelConfig] = GrSwizzle::RGBA();
-    }
 
     // Bulk populate the texture internal/external formats here and then deal with exceptions below.
 
@@ -3284,19 +3229,13 @@
         case GR_GL_R16F:
             config = kAlpha_half_as_Red_GrPixelConfig;
             break;
+        // Experimental (for P016 and P010)
         case GR_GL_R16:
             config = kR_16_GrPixelConfig;
             break;
         case GR_GL_RG16:
             config = kRG_1616_GrPixelConfig;
             break;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GR_GL_RGBA16:
-            config = kRGBA_16161616_GrPixelConfig;
-            break;
-        case GR_GL_RG16F:
-            config = kRG_half_GrPixelConfig;
-            break;
     }
 
     return config;
@@ -3354,16 +3293,11 @@
             return GR_GL_RGBA32F == format;
         case GrColorType::kRGB_ETC1:
             return GR_GL_COMPRESSED_RGB8_ETC2 == format || GR_GL_COMPRESSED_ETC1_RGB8 == format;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:
             return GR_GL_R16 == format;
         case GrColorType::kRG_1616:
             return GR_GL_RG16 == format;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:
-            return GR_GL_RGBA16 == format;
-        case GrColorType::kRG_half:
-            return GR_GL_RG16F == format;
-
     }
     SK_ABORT("Unknown color type");
     return false;
diff --git a/src/gpu/gl/GrGLDefines.h b/src/gpu/gl/GrGLDefines.h
index 5d8fac2..28b3798 100644
--- a/src/gpu/gl/GrGLDefines.h
+++ b/src/gpu/gl/GrGLDefines.h
@@ -480,7 +480,6 @@
 #define GR_GL_RG16                           0x822C
 #define GR_GL_R16F                           0x822D
 #define GR_GL_R32F                           0x822E
-#define GR_GL_RG16F                          0x822F
 
 /* RG sized integer formats */
 #define GR_GL_RG8I                           0x8237
@@ -513,7 +512,6 @@
 #define GR_GL_RGBA16F                        0x881A
 #define GR_GL_RGBA32F                        0x8814
 #define GR_GL_RG32F                          0x8230
-#define GR_GL_RGBA16                         0x805B
 
 /* RGBA integer sized formats */
 #define GR_GL_RGBA8I                         0x8D8E
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 160a0b9..811b718 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -873,7 +873,6 @@
         case kAlpha_half_as_Red_GrPixelConfig:
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
-        case kR_16_GrPixelConfig:
             return 2;
         case kRGBA_8888_GrPixelConfig:
         case kRGB_888_GrPixelConfig:  // We're really talking about GrColorType::kRGB_888x here.
@@ -884,16 +883,15 @@
         case kRGBA_1010102_GrPixelConfig:
         case kRGBA_float_GrPixelConfig:
         case kRG_float_GrPixelConfig:
-        case kRG_1616_GrPixelConfig:
             return 4;
         case kRGB_ETC1_GrPixelConfig:
         case kUnknown_GrPixelConfig:
             return 0;
 
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            return 8;
-        case kRG_half_GrPixelConfig:
+        // Experimental (for P016 and P010)
+        case kR_16_GrPixelConfig:
+            return 2;
+        case kRG_1616_GrPixelConfig:
             return 4;
     }
     SK_ABORT("Invalid pixel config");
@@ -3990,20 +3988,14 @@
         case GR_GL_R16F:
             *config = kAlpha_half_GrPixelConfig;
             return true;
+
+        // Experimental (for P016 and P010)
         case GR_GL_R16:
             *config = kR_16_GrPixelConfig;
             return true;
         case GR_GL_RG16:
             *config = kRG_1616_GrPixelConfig;
             return true;
-
-        // Experimental (for Y416 and mutant P016/P010)
-        case GR_GL_RGBA16:
-            *config = kRGBA_16161616_GrPixelConfig;
-            return true;
-        case GR_GL_RG16F:
-            *config = kRG_half_GrPixelConfig;
-            return true;
     }
 
     SK_ABORT("Unexpected config");
diff --git a/src/gpu/gl/GrGLUtil.cpp b/src/gpu/gl/GrGLUtil.cpp
index b1f989c..f50932e 100644
--- a/src/gpu/gl/GrGLUtil.cpp
+++ b/src/gpu/gl/GrGLUtil.cpp
@@ -612,7 +612,6 @@
         case GR_GL_RGBA4:
         case GR_GL_RG8:
         case GR_GL_R16F:
-        case GR_GL_R16:
             return 2;
 
         case GR_GL_RGB8:
@@ -622,7 +621,6 @@
         case GR_GL_SRGB8_ALPHA8:
         case GR_GL_BGRA8:
         case GR_GL_RGB10_A2:
-        case GR_GL_RG16:
             return 4;
 
         case GR_GL_RGBA16F:
@@ -636,11 +634,11 @@
         case GR_GL_COMPRESSED_ETC1_RGB8:
             return 0;
 
-        // Experimental (for Y416 and mutant P016/P010)
-        case GR_GL_RG16F:
+        // Experimental (for P016 and P010)
+        case GR_GL_R16:
+            return 2;
+        case GR_GL_RG16:
             return 4;
-        case GR_GL_RGBA16:
-            return 8;
     }
 
     SK_ABORT("Invalid GL format");
diff --git a/src/gpu/gl/GrGLVertexArray.cpp b/src/gpu/gl/GrGLVertexArray.cpp
index 38c0254..4e6346d 100644
--- a/src/gpu/gl/GrGLVertexArray.cpp
+++ b/src/gpu/gl/GrGLVertexArray.cpp
@@ -74,10 +74,9 @@
             return {false, 1, GR_GL_INT};
         case kUint_GrVertexAttribType:
             return {false, 1, GR_GL_UNSIGNED_INT};
+        // Experimental (for P016 and P010)
         case kUShort_norm_GrVertexAttribType:
             return {true, 1, GR_GL_UNSIGNED_SHORT};
-        case kUShort4_norm_GrVertexAttribType:
-            return {true, 4, GR_GL_UNSIGNED_SHORT};
     }
     SK_ABORT("Unknown vertex attrib type");
     return {false, 0, 0};
diff --git a/src/gpu/mtl/GrMtlCaps.mm b/src/gpu/mtl/GrMtlCaps.mm
index 4064722..34ecb67 100644
--- a/src/gpu/mtl/GrMtlCaps.mm
+++ b/src/gpu/mtl/GrMtlCaps.mm
@@ -411,6 +411,7 @@
     info = &fConfigTable[kRGBA_half_Clamped_GrPixelConfig];
     info->fFlags = ConfigInfo::kAllFlags;
 
+    // Experimental (for P016 and P010)
     // R_16 uses R16Unorm
     info = &fConfigTable[kR_16_GrPixelConfig];
     if (this->isMac()) {
@@ -426,20 +427,6 @@
     } else {
         info->fFlags = ConfigInfo::kTextureable_Flag | ConfigInfo::kRenderable_Flag;
     }
-
-    // Experimental (for Y416 and mutant P016/P010)
-
-    // RGBA_16161616 uses RGBA16Unorm
-    info = &fConfigTable[kRGBA_16161616_GrPixelConfig];
-    if (this->isMac()) {
-        info->fFlags = ConfigInfo::kAllFlags;
-    } else {
-        info->fFlags = ConfigInfo::kTextureable_Flag | ConfigInfo::kRenderable_Flag;
-    }
-
-    // RG_half uses RG16Float
-    info = &fConfigTable[kRG_half_GrPixelConfig];
-    info->fFlags = ConfigInfo::kAllFlags;
 }
 
 void GrMtlCaps::initStencilFormat(id<MTLDevice> physDev) {
@@ -575,19 +562,13 @@
         case MTLPixelFormatRGB10A2Unorm:
             return kRGBA_1010102_GrPixelConfig;
             break;
+        // Experimental (for P016 and P010)
         case MTLPixelFormatR16Unorm:
             return kR_16_GrPixelConfig;
             break;
         case MTLPixelFormatRG16Unorm:
             return kRG_1616_GrPixelConfig;
             break;
-        // Experimental (for Y416 and mutant P016/P010)
-        case MTLPixelFormatRGBA16Unorm:
-            return kRGBA_16161616_GrPixelConfig;
-            break;
-        case MTLPixelFormatRG16Float:
-            return kRG_half_GrPixelConfig;
-            break;
         default:
             return kUnknown_GrPixelConfig;
             break;
@@ -662,15 +643,11 @@
 #else
             return MTLPixelFormatETC2_RGB8 == format;
 #endif
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:
             return MTLPixelFormatR16Unorm == format;
         case GrColorType::kRG_1616:
             return MTLPixelFormatRG16Unorm == format;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:
-            return MTLPixelFormatRGBA16Unorm == format;
-        case GrColorType::kRG_half:
-            return MTLPixelFormatRG16Float == format;
     }
     SK_ABORT("Unknown color type");
     return false;
diff --git a/src/gpu/mtl/GrMtlGpu.mm b/src/gpu/mtl/GrMtlGpu.mm
index eaf3470..8d01094 100644
--- a/src/gpu/mtl/GrMtlGpu.mm
+++ b/src/gpu/mtl/GrMtlGpu.mm
@@ -753,20 +753,13 @@
             *config = kRGB_ETC1_GrPixelConfig;
             return true;
 #endif
+        // Experimental (for P016 and P010)
         case MTLPixelFormatR16Unorm:
             *config = kR_16_GrPixelConfig;
             return true;
         case MTLPixelFormatRG16Unorm:
             *config = kRG_1616_GrPixelConfig;
             return true;
-
-        // Experimental (for Y416 and mutant P016/P010)
-        case MTLPixelFormatRGBA16Unorm:
-            *config = kRGBA_16161616_GrPixelConfig;
-            return true;
-        case MTLPixelFormatRG16Float:
-            *config = kRG_half_GrPixelConfig;
-            return true;
         default:
             return false;
     }
diff --git a/src/gpu/mtl/GrMtlPipelineStateBuilder.mm b/src/gpu/mtl/GrMtlPipelineStateBuilder.mm
index 6ad4ae7..90b91ef 100644
--- a/src/gpu/mtl/GrMtlPipelineStateBuilder.mm
+++ b/src/gpu/mtl/GrMtlPipelineStateBuilder.mm
@@ -141,11 +141,9 @@
             return MTLVertexFormatInt;
         case kUint_GrVertexAttribType:
             return MTLVertexFormatUInt;
+        // Experimental (for P016 and P010)
         case kUShort_norm_GrVertexAttribType:
             return MTLVertexFormatUShortNormalized;
-        // Experimental (for Y416)
-        case kUShort4_norm_GrVertexAttribType:
-            return MTLVertexFormatUShort4Normalized;
     }
     SK_ABORT("Unknown vertex attribute type");
     return MTLVertexFormatInvalid;
diff --git a/src/gpu/mtl/GrMtlUtil.mm b/src/gpu/mtl/GrMtlUtil.mm
index 007abe2..5bd6222 100644
--- a/src/gpu/mtl/GrMtlUtil.mm
+++ b/src/gpu/mtl/GrMtlUtil.mm
@@ -110,14 +110,6 @@
         case kRG_1616_GrPixelConfig:
             *format = MTLPixelFormatRG16Unorm;
             return true;
-
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            *format = MTLPixelFormatRGBA16Unorm;
-            return true;
-        case kRG_half_GrPixelConfig:
-            *format = MTLPixelFormatRG16Float;
-            return true;
     }
     SK_ABORT("Unexpected config");
     return false;
diff --git a/src/gpu/vk/GrVkCaps.cpp b/src/gpu/vk/GrVkCaps.cpp
index 3534d12..5db4d45 100644
--- a/src/gpu/vk/GrVkCaps.cpp
+++ b/src/gpu/vk/GrVkCaps.cpp
@@ -85,7 +85,6 @@
         case kRG_88_GrPixelConfig:
         case kAlpha_half_GrPixelConfig:
         case kAlpha_half_as_Red_GrPixelConfig:
-        case kR_16_GrPixelConfig:
             return 2;
         case kRGB_888_GrPixelConfig:
             return 3;
@@ -95,7 +94,6 @@
         case kSRGBA_8888_GrPixelConfig:
         case kSBGRA_8888_GrPixelConfig:
         case kRGBA_1010102_GrPixelConfig:
-        case kRG_1616_GrPixelConfig:
             return 4;
         case kRGBA_half_GrPixelConfig:
         case kRGBA_half_Clamped_GrPixelConfig:
@@ -110,11 +108,10 @@
         case kGray_8_as_Lum_GrPixelConfig:
             SK_ABORT("Unsupported Vulkan pixel config");
             return 0;
-
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            return 8;
-        case kRG_half_GrPixelConfig:
+        // Experimental (for P016 and P010)
+        case kR_16_GrPixelConfig:
+            return 2;
+        case kRG_1616_GrPixelConfig:
             return 4;
     }
     SK_ABORT("Invalid pixel config");
@@ -675,11 +672,9 @@
         case VK_FORMAT_R32G32_SFLOAT:
         case VK_FORMAT_R16G16B16A16_SFLOAT:
         case VK_FORMAT_R16_SFLOAT:
+        // Experimental (for P016 and P010)
         case VK_FORMAT_R16_UNORM:
         case VK_FORMAT_R16G16_UNORM:
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-        case VK_FORMAT_R16G16_SFLOAT:
             return false;
         default:
             SK_ABORT("Unsupported VkFormat");
@@ -707,11 +702,10 @@
     VK_FORMAT_R8G8B8A8_SRGB,
     VK_FORMAT_B8G8R8A8_SRGB,
     VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK,
+
+    // Experimental (for P016 and P010)
     VK_FORMAT_R16_UNORM,
     VK_FORMAT_R16G16_UNORM,
-    // Experimental (for Y416 and mutant P016/P010)
-    VK_FORMAT_R16G16B16A16_UNORM,
-    VK_FORMAT_R16G16_SFLOAT,
 };
 
 const GrVkCaps::FormatInfo& GrVkCaps::getFormatInfo(VkFormat format) const {
@@ -1050,15 +1044,11 @@
             return kBGRA_8888_GrPixelConfig;
         case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
             return kRGBA_1010102_GrPixelConfig;
+        // Experimental (for P016 and P010)
         case VK_FORMAT_R16_UNORM:
             return kR_16_GrPixelConfig;
         case VK_FORMAT_R16G16_UNORM:
             return kRG_1616_GrPixelConfig;
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-            return kRGBA_16161616_GrPixelConfig;
-        case VK_FORMAT_R16G16_SFLOAT:
-            return kRG_half_GrPixelConfig;
         default:
             return kUnknown_GrPixelConfig;
     }
@@ -1121,15 +1111,11 @@
             return VK_FORMAT_R32G32B32A32_SFLOAT == vkFormat;
         case GrColorType::kRGB_ETC1:
             return VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK == vkFormat;
+        // Experimental (for P016 and P010)
         case GrColorType::kR_16:
             return VK_FORMAT_R16_UNORM == vkFormat;
         case GrColorType::kRG_1616:
             return VK_FORMAT_R16G16_UNORM == vkFormat;
-        // Experimental (for Y416 and mutant P016/P010)
-        case GrColorType::kRGBA_16161616:
-            return VK_FORMAT_R16G16B16A16_UNORM == vkFormat;
-        case GrColorType::kRG_half:
-            return VK_FORMAT_R16G16_SFLOAT == vkFormat;
     }
     SK_ABORT("Unknown color type");
     return false;
diff --git a/src/gpu/vk/GrVkCaps.h b/src/gpu/vk/GrVkCaps.h
index d43f67b..3f9af35 100644
--- a/src/gpu/vk/GrVkCaps.h
+++ b/src/gpu/vk/GrVkCaps.h
@@ -218,7 +218,7 @@
 
         SkTDArray<int> fColorSampleCounts;
     };
-    static const size_t kNumVkFormats = 21;
+    static const size_t kNumVkFormats = 19;
     FormatInfo fFormatTable[kNumVkFormats];
 
     const FormatInfo& getFormatInfo(VkFormat) const;
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index de6573f..4dd8a32 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -1822,19 +1822,13 @@
         case VK_FORMAT_R16_SFLOAT:
             *config = kAlpha_half_GrPixelConfig;
             return true;
+        // Experimental (for P016 and P010)
         case VK_FORMAT_R16_UNORM:
             *config = kR_16_GrPixelConfig;
             return true;
         case VK_FORMAT_R16G16_UNORM:
             *config = kRG_1616_GrPixelConfig;
             return true;
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-            *config = kRGBA_16161616_GrPixelConfig;
-            return true;
-        case VK_FORMAT_R16G16_SFLOAT:
-            *config = kRG_half_GrPixelConfig;
-            return true;
         default:
             return false;
     }
diff --git a/src/gpu/vk/GrVkPipeline.cpp b/src/gpu/vk/GrVkPipeline.cpp
index 830ace4..2501f06 100644
--- a/src/gpu/vk/GrVkPipeline.cpp
+++ b/src/gpu/vk/GrVkPipeline.cpp
@@ -74,11 +74,9 @@
             return VK_FORMAT_R32_SINT;
         case kUint_GrVertexAttribType:
             return VK_FORMAT_R32_UINT;
+        // Experimental (for P016 and P010)
         case kUShort_norm_GrVertexAttribType:
             return VK_FORMAT_R16_UNORM;
-        // Experimental (for Y416)
-        case kUShort4_norm_GrVertexAttribType:
-            return VK_FORMAT_R16G16B16A16_UNORM;
     }
     SK_ABORT("Unknown vertex attrib type");
     return VK_FORMAT_UNDEFINED;
diff --git a/src/gpu/vk/GrVkUtil.cpp b/src/gpu/vk/GrVkUtil.cpp
index f3ad00c..338cc3b 100644
--- a/src/gpu/vk/GrVkUtil.cpp
+++ b/src/gpu/vk/GrVkUtil.cpp
@@ -83,20 +83,13 @@
         case kAlpha_half_as_Red_GrPixelConfig:
             *format = VK_FORMAT_R16_SFLOAT;
             return true;
+        // Experimental (for P016 and P010)
         case kR_16_GrPixelConfig:
             *format = VK_FORMAT_R16_UNORM;
             return true;
         case kRG_1616_GrPixelConfig:
             *format = VK_FORMAT_R16G16_UNORM;
             return true;
-        // Experimental (for Y416 and mutant P016/P010)
-        case kRGBA_16161616_GrPixelConfig:
-            *format = VK_FORMAT_R16G16B16A16_UNORM;
-            return true;
-        case kRG_half_GrPixelConfig:
-            *format = VK_FORMAT_R16G16_SFLOAT;
-            return true;
-
     }
     SK_ABORT("Unexpected config");
     return false;
@@ -143,15 +136,11 @@
         case VK_FORMAT_R16_SFLOAT:
             return kAlpha_half_GrPixelConfig == config ||
                    kAlpha_half_as_Red_GrPixelConfig == config;
+        // Experimental (for P016 and P010)
         case VK_FORMAT_R16_UNORM:
             return kR_16_GrPixelConfig == config;
         case VK_FORMAT_R16G16_UNORM:
             return kRG_1616_GrPixelConfig == config;
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-            return kRGBA_16161616_GrPixelConfig == config;
-        case VK_FORMAT_R16G16_SFLOAT:
-            return kRG_half_GrPixelConfig == config;
         default:
             return false;
     }
@@ -176,11 +165,10 @@
         case VK_FORMAT_R32G32_SFLOAT:
         case VK_FORMAT_R16G16B16A16_SFLOAT:
         case VK_FORMAT_R16_SFLOAT:
+
+        // Experimental (for P016 and P010)
         case VK_FORMAT_R16_UNORM:
         case VK_FORMAT_R16G16_UNORM:
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-        case VK_FORMAT_R16G16_SFLOAT:
             return true;
         default:
             return false;
@@ -296,7 +284,6 @@
         case VK_FORMAT_B4G4R4A4_UNORM_PACK16:
         case VK_FORMAT_R8G8_UNORM:
         case VK_FORMAT_R16_SFLOAT:
-        case VK_FORMAT_R16_UNORM:
             return 2;
 
         case VK_FORMAT_R8G8B8_UNORM:
@@ -307,7 +294,6 @@
         case VK_FORMAT_B8G8R8A8_UNORM:
         case VK_FORMAT_B8G8R8A8_SRGB:
         case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
-        case VK_FORMAT_R16G16_UNORM:
             return 4;
 
         case VK_FORMAT_R16G16B16A16_SFLOAT:
@@ -320,10 +306,10 @@
         case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
             return 0;
 
-        // Experimental (for Y416 and mutant P016/P010)
-        case VK_FORMAT_R16G16B16A16_UNORM:
-            return 8;
-        case VK_FORMAT_R16G16_SFLOAT:
+        // Experimental (for P016 and P010)
+        case VK_FORMAT_R16_UNORM:
+            return 2;
+        case VK_FORMAT_R16G16_UNORM:
             return 4;
 
         default:
diff --git a/tests/BackendAllocationTest.cpp b/tests/BackendAllocationTest.cpp
index 2861177..798ff6e 100644
--- a/tests/BackendAllocationTest.cpp
+++ b/tests/BackendAllocationTest.cpp
@@ -454,17 +454,12 @@
           kRGB_ETC1_GrPixelConfig,          SkColors::kRed      },
         { kUnknown_SkColorType,             GR_GL_COMPRESSED_ETC1_RGB8,
           kRGB_ETC1_GrPixelConfig,          SkColors::kRed      },
+
+        // Experimental (for P016 and P010)
         { kUnknown_SkColorType,             GR_GL_R16,
           kR_16_GrPixelConfig,              SkColors::kRed      },
         { kUnknown_SkColorType,             GR_GL_RG16,
-          kRG_1616_GrPixelConfig,           SkColors::kYellow   },
-
-        // Experimental (for Y416 and mutant P016/P010)
-        { kUnknown_SkColorType,             GR_GL_RGBA16,
-          kRGBA_16161616_GrPixelConfig,     SkColors::kLtGray   },
-        { kUnknown_SkColorType,             GR_GL_RG16F,
-          kRG_half_GrPixelConfig,           SkColors::kYellow   },
-
+          kRG_1616_GrPixelConfig,           SkColors::kYellow      },
     };
 
     for (auto combo : combinations) {
@@ -605,12 +600,10 @@
         { kUnknown_SkColorType,      VK_FORMAT_R8G8_UNORM,               { 0.5f, 0.5f, 0, 0 } },
         { kUnknown_SkColorType,      VK_FORMAT_R16_SFLOAT,               { 1.0f, 0, 0, 0.5f } },
         { kUnknown_SkColorType,      VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK,  SkColors::kRed       },
+
+        // Experimental (for P016 and P010)
         { kUnknown_SkColorType,      VK_FORMAT_R16_UNORM,                SkColors::kRed       },
         { kUnknown_SkColorType,      VK_FORMAT_R16G16_UNORM,             SkColors::kYellow    },
-
-        // Experimental (for Y416 and mutant P016/P010)
-        { kUnknown_SkColorType,      VK_FORMAT_R16G16B16A16_UNORM,       SkColors::kLtGray    },
-        { kUnknown_SkColorType,      VK_FORMAT_R16G16_SFLOAT,            SkColors::kYellow    },
     };
 
     for (auto combo : combinations) {
diff --git a/tests/GrSurfaceTest.cpp b/tests/GrSurfaceTest.cpp
index 87b9744..afe3f5c 100644
--- a/tests/GrSurfaceTest.cpp
+++ b/tests/GrSurfaceTest.cpp
@@ -105,12 +105,9 @@
         kRGBA_half_Clamped_GrPixelConfig,
         kRGB_ETC1_GrPixelConfig,
 
+        // Experimental (for P016 and P010)
         kR_16_GrPixelConfig,
         kRG_1616_GrPixelConfig,
-
-        // Experimental (for Y416 and mutant P016/P010)
-        kRGBA_16161616_GrPixelConfig,
-        kRG_half_GrPixelConfig,
     };
     GR_STATIC_ASSERT(kGrPixelConfigCnt == SK_ARRAY_COUNT(configs));