Some GrGLShaderBuilder cleanup

Review URL: https://codereview.appspot.com/6500043/



git-svn-id: http://skia.googlecode.com/svn/trunk@5322 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/effects/GrConfigConversionEffect.cpp b/src/gpu/effects/GrConfigConversionEffect.cpp
index 1067906..fbf5a40 100644
--- a/src/gpu/effects/GrConfigConversionEffect.cpp
+++ b/src/gpu/effects/GrConfigConversionEffect.cpp
@@ -24,7 +24,7 @@
                         const char* inputColor,
                         const char* samplerName) SK_OVERRIDE {
         builder->fFSCode.append("\tvec4 tempColor;\n");
-        builder->emitDefaultFetch("tempColor", samplerName);
+        builder->emitTextureLookupAndModulate("tempColor", samplerName);
         if (GrConfigConversionEffect::kNone_PMConversion == fPMConversion) {
             GrAssert(fSwapRedAndBlue);
             builder->fFSCode.appendf("\t%s = tempColor.bgra;\n", outputColor);