switched SkSL's temporary 'highfloat' type back to 'float'

Bug: skia:
Change-Id: If0debae7318b6b5b4a7cb85d458996a09931127e
Reviewed-on: https://skia-review.googlesource.com/48760
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/shaders/gradients/SkGradientShader.cpp b/src/shaders/gradients/SkGradientShader.cpp
index 46d3ef6..88990c7 100644
--- a/src/shaders/gradients/SkGradientShader.cpp
+++ b/src/shaders/gradients/SkGradientShader.cpp
@@ -1359,7 +1359,7 @@
                                                      "Colors",
                                                      colorCount);
         if (kSingleHardStop_ColorType == ge.fColorType || kThree_ColorType == ge.fColorType) {
-            fExtraStopT = uniformHandler->addUniform(kFragment_GrShaderFlag, kHighFloat4_GrSLType,
+            fExtraStopT = uniformHandler->addUniform(kFragment_GrShaderFlag, kFloat4_GrSLType,
                                                      kHigh_GrSLPrecision, "ExtraStopT");
         }
     } else {
@@ -1684,7 +1684,7 @@
     fragBuilder->codeAppendf("half2 coord = half2(%s, %s);", gradientTValue, fsyuni);
     fragBuilder->codeAppendf("%s = ", outputColor);
     fragBuilder->appendTextureLookupAndModulate(inputColor, texSamplers[0], "coord",
-                                                kHighFloat2_GrSLType, &fColorSpaceHelper);
+                                                kFloat2_GrSLType, &fColorSpaceHelper);
     fragBuilder->codeAppend(";");
 }