Rename EmitArgs::fSamplers to fTexSamplers

Renames fSamplers to fTexSamplers in GrProcessor EmitArgs, and renames
GrGLSLTextureSampler to GrGLSLSampler. This will allow us to add a
second array of buffer samplers.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1862373003

Review URL: https://codereview.chromium.org/1862373003
diff --git a/src/gpu/effects/GrBicubicEffect.cpp b/src/gpu/effects/GrBicubicEffect.cpp
index a74b2d4..0a06b62 100644
--- a/src/gpu/effects/GrBicubicEffect.cpp
+++ b/src/gpu/effects/GrBicubicEffect.cpp
@@ -99,7 +99,7 @@
                                   domain,
                                   sampleVar.c_str(),
                                   coord,
-                                  args.fSamplers[0]);
+                                  args.fTexSamplers[0]);
         }
         fragBuilder->codeAppendf(
             "\tvec4 s%d = %s(%s, f.x, rowColors[0], rowColors[1], rowColors[2], rowColors[3]);\n",
diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index b5bae46..246d7be 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -66,14 +66,14 @@
         if (cte.maskFormat() == kARGB_GrMaskFormat) {
             fragBuilder->codeAppendf("%s = ", args.fOutputColor);
             fragBuilder->appendTextureLookupAndModulate(args.fOutputColor,
-                                                        args.fSamplers[0],
+                                                        args.fTexSamplers[0],
                                                         v.fsIn(),
                                                         kVec2f_GrSLType);
             fragBuilder->codeAppend(";");
             fragBuilder->codeAppendf("%s = vec4(1);", args.fOutputCoverage);
         } else {
             fragBuilder->codeAppendf("%s = ", args.fOutputCoverage);
-            fragBuilder->appendTextureLookup(args.fSamplers[0], v.fsIn(), kVec2f_GrSLType);
+            fragBuilder->appendTextureLookup(args.fTexSamplers[0], v.fsIn(), kVec2f_GrSLType);
             fragBuilder->codeAppend(";");
             if (cte.maskFormat() == kA565_GrMaskFormat) {
                 // set alpha to be max of rgb coverage
diff --git a/src/gpu/effects/GrConfigConversionEffect.cpp b/src/gpu/effects/GrConfigConversionEffect.cpp
index bedcc78..4743f34 100644
--- a/src/gpu/effects/GrConfigConversionEffect.cpp
+++ b/src/gpu/effects/GrConfigConversionEffect.cpp
@@ -31,7 +31,7 @@
         fragBuilder->codeAppendf("%s;", tmpDecl.c_str());
 
         fragBuilder->codeAppendf("%s = ", tmpVar.c_str());
-        fragBuilder->appendTextureLookup(args.fSamplers[0], args.fCoords[0].c_str(),
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0], args.fCoords[0].c_str(),
                                        args.fCoords[0].getType());
         fragBuilder->codeAppend(";");
 
diff --git a/src/gpu/effects/GrConvolutionEffect.cpp b/src/gpu/effects/GrConvolutionEffect.cpp
index 4f09138..9567e4c 100644
--- a/src/gpu/effects/GrConvolutionEffect.cpp
+++ b/src/gpu/effects/GrConvolutionEffect.cpp
@@ -82,7 +82,7 @@
                                      component, bounds, component, bounds);
         }
         fragBuilder->codeAppendf("\t\t%s += ", args.fOutputColor);
-        fragBuilder->appendTextureLookup(args.fSamplers[0], "coord");
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0], "coord");
         fragBuilder->codeAppendf(" * %s;\n", kernelIndex.c_str());
         if (ce.useBounds()) {
             fragBuilder->codeAppend("}");
diff --git a/src/gpu/effects/GrDistanceFieldGeoProc.cpp b/src/gpu/effects/GrDistanceFieldGeoProc.cpp
index 5153ad8..0c4125d 100644
--- a/src/gpu/effects/GrDistanceFieldGeoProc.cpp
+++ b/src/gpu/effects/GrDistanceFieldGeoProc.cpp
@@ -101,7 +101,7 @@
         fragBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn());
 
         fragBuilder->codeAppend("\tfloat texColor = ");
-        fragBuilder->appendTextureLookup(args.fSamplers[0],
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0],
                                          "uv",
                                          kVec2f_GrSLType);
         fragBuilder->codeAppend(".r;\n");
@@ -338,7 +338,7 @@
         fragBuilder->codeAppendf("vec2 uv = %s;", v.fsIn());
 
         fragBuilder->codeAppend("float texColor = ");
-        fragBuilder->appendTextureLookup(args.fSamplers[0],
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0],
                                          "uv",
                                          kVec2f_GrSLType);
         fragBuilder->codeAppend(".r;");
@@ -607,20 +607,20 @@
 
         // green is distance to uv center
         fragBuilder->codeAppend("\tvec4 texColor = ");
-        fragBuilder->appendTextureLookup(args.fSamplers[0], "uv", kVec2f_GrSLType);
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0], "uv", kVec2f_GrSLType);
         fragBuilder->codeAppend(";\n");
         fragBuilder->codeAppend("\tvec3 distance;\n");
         fragBuilder->codeAppend("\tdistance.y = texColor.r;\n");
         // red is distance to left offset
         fragBuilder->codeAppend("\tvec2 uv_adjusted = uv - offset;\n");
         fragBuilder->codeAppend("\ttexColor = ");
-        fragBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType);
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0], "uv_adjusted", kVec2f_GrSLType);
         fragBuilder->codeAppend(";\n");
         fragBuilder->codeAppend("\tdistance.x = texColor.r;\n");
         // blue is distance to right offset
         fragBuilder->codeAppend("\tuv_adjusted = uv + offset;\n");
         fragBuilder->codeAppend("\ttexColor = ");
-        fragBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType);
+        fragBuilder->appendTextureLookup(args.fTexSamplers[0], "uv_adjusted", kVec2f_GrSLType);
         fragBuilder->codeAppend(";\n");
         fragBuilder->codeAppend("\tdistance.z = texColor.r;\n");
 
diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.cpp b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
index 21af535..60f518b 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.cpp
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
@@ -86,7 +86,7 @@
                                   domain,
                                   "c",
                                   coord,
-                                  args.fSamplers[0]);
+                                  args.fTexSamplers[0]);
             if (!mce.convolveAlpha()) {
                 fragBuilder->codeAppend("c.rgb /= c.a;");
                 fragBuilder->codeAppend("c.rgb = clamp(c.rgb, 0.0, 1.0);");
@@ -105,7 +105,7 @@
                               domain,
                               "c",
                               coords2D,
-                              args.fSamplers[0]);
+                              args.fTexSamplers[0]);
         fragBuilder->codeAppendf("%s.a = c.a;", args.fOutputColor);
         fragBuilder->codeAppendf("%s.rgb = sum.rgb * %s + %s;", args.fOutputColor, gain, bias);
         fragBuilder->codeAppendf("%s.rgb *= %s.a;", args.fOutputColor, args.fOutputColor);
diff --git a/src/gpu/effects/GrSimpleTextureEffect.cpp b/src/gpu/effects/GrSimpleTextureEffect.cpp
index 904b898..f4cbd06 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.cpp
+++ b/src/gpu/effects/GrSimpleTextureEffect.cpp
@@ -17,7 +17,7 @@
         GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
         fragBuilder->codeAppendf("%s = ", args.fOutputColor);
         fragBuilder->appendTextureLookupAndModulate(args.fInputColor,
-                                                  args.fSamplers[0],
+                                                  args.fTexSamplers[0],
                                                   args.fCoords[0].c_str(),
                                                   args.fCoords[0].getType());
         fragBuilder->codeAppend(";");
diff --git a/src/gpu/effects/GrTextureDomain.cpp b/src/gpu/effects/GrTextureDomain.cpp
index 724b3ec..4394c0e 100644
--- a/src/gpu/effects/GrTextureDomain.cpp
+++ b/src/gpu/effects/GrTextureDomain.cpp
@@ -12,8 +12,8 @@
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
+#include "glsl/GrGLSLSampler.h"
 #include "glsl/GrGLSLShaderBuilder.h"
-#include "glsl/GrGLSLTextureSampler.h"
 #include "glsl/GrGLSLUniformHandler.h"
 
 GrTextureDomain::GrTextureDomain(const SkRect& domain, Mode mode, int index)
@@ -49,7 +49,7 @@
                                               const GrTextureDomain& textureDomain,
                                               const char* outColor,
                                               const SkString& inCoords,
-                                              const GrGLSLTextureSampler& sampler,
+                                              const GrGLSLSampler& sampler,
                                               const char* inModulateColor) {
     SkASSERT((Mode)-1 == fMode || textureDomain.mode() == fMode);
     SkDEBUGCODE(fMode = textureDomain.mode();)
@@ -198,7 +198,7 @@
                             domain,
                             args.fOutputColor,
                             coords2D,
-                            args.fSamplers[0],
+                            args.fTexSamplers[0],
                             args.fInputColor);
 }
 
diff --git a/src/gpu/effects/GrTextureDomain.h b/src/gpu/effects/GrTextureDomain.h
index e88f5d5..2877c39 100644
--- a/src/gpu/effects/GrTextureDomain.h
+++ b/src/gpu/effects/GrTextureDomain.h
@@ -15,7 +15,7 @@
 class GrGLProgramBuilder;
 class GrGLSLShaderBuilder;
 class GrInvariantOutput;
-class GrGLSLTextureSampler;
+class GrGLSLSampler;
 class GrGLSLUniformHandler;
 struct SkRect;
 
@@ -120,7 +120,7 @@
                            const GrTextureDomain& textureDomain,
                            const char* outColor,
                            const SkString& inCoords,
-                           const GrGLSLTextureSampler& sampler,
+                           const GrGLSLSampler& sampler,
                            const char* inModulateColor = nullptr);
 
         /**
diff --git a/src/gpu/effects/GrYUVEffect.cpp b/src/gpu/effects/GrYUVEffect.cpp
index ef1bf1b..97ef663 100644
--- a/src/gpu/effects/GrYUVEffect.cpp
+++ b/src/gpu/effects/GrYUVEffect.cpp
@@ -106,13 +106,13 @@
                                                           kMat44f_GrSLType, kDefault_GrSLPrecision,
                                                           "ColorSpaceMatrix", &colorSpaceMatrix);
             fragBuilder->codeAppendf("%s = vec4(", args.fOutputColor);
-            fragBuilder->appendTextureLookup(args.fSamplers[0], args.fCoords[0].c_str(),
+            fragBuilder->appendTextureLookup(args.fTexSamplers[0], args.fCoords[0].c_str(),
                                              args.fCoords[0].getType());
             fragBuilder->codeAppend(".r,");
-            fragBuilder->appendTextureLookup(args.fSamplers[1], args.fCoords[1].c_str(),
+            fragBuilder->appendTextureLookup(args.fTexSamplers[1], args.fCoords[1].c_str(),
                                              args.fCoords[1].getType());
             fragBuilder->codeAppend(".r,");
-            fragBuilder->appendTextureLookup(args.fSamplers[2], args.fCoords[2].c_str(),
+            fragBuilder->appendTextureLookup(args.fTexSamplers[2], args.fCoords[2].c_str(),
                                              args.fCoords[2].getType());
             fragBuilder->codeAppendf(".r, 1.0) * %s;", colorSpaceMatrix);
         }