Create GLSLUniformHandler class for gpu backend

src/gpu/effects/GrConstColorProcessor.cpp

Index: src/gpu/effects/GrConstColorProcessor.cpp
diff --git a/src/gpu/effects/GrConstColorProcessor.cpp b/src/gpu/effects/GrConstColorProcessor.cpp
index cf567aac5c4f08d91b07131e297a61913a4d3705..03b0fa405426bd51ab22ecd14612900cf1de5d60 100644
--- a/src/gpu/effects/GrConstColorProcessor.cpp
+++ b/src/gpu/effects/GrConstColorProcessor.cpp
@@ -6,10 +6,11 @@
  */
 
 #include "effects/GrConstColorProcessor.h"
+#include "GrInvariantOutput.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
-#include "glsl/GrGLSLProgramBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
+#include "glsl/GrGLSLUniformHandler.h"
 
 class GLConstColorProcessor : public GrGLSLFragmentProcessor {
 public:
@@ -18,9 +19,10 @@ public:
     void emitCode(EmitArgs& args) override {
         GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
         const char* colorUni;
-        fColorUniform = args.fBuilder->addUniform(GrGLSLProgramBuilder::kFragment_Visibility,
-                                            kVec4f_GrSLType, kMedium_GrSLPrecision, "constantColor",
-                                            &colorUni);
+        fColorUniform = args.fUniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
+                                                         kVec4f_GrSLType, kMedium_GrSLPrecision,
+                                                         "constantColor",
+                                                         &colorUni);
         GrConstColorProcessor::InputMode mode = args.fFp.cast<GrConstColorProcessor>().inputMode();
         if (!args.fInputColor) {
             mode = GrConstColorProcessor::kIgnore_InputMode;