Create GLSLUniformHandler class for gpu backend

src/effects/gradients/SkLinearGradient.cpp

Index: src/effects/gradients/SkLinearGradient.cpp
diff --git a/src/effects/gradients/SkLinearGradient.cpp b/src/effects/gradients/SkLinearGradient.cpp
index b22447453679a63ee0025cd961a1b44da152f9c4..9f7418f7eaa27c4e56de0753558b1b37e2ea4f16 100644
--- a/src/effects/gradients/SkLinearGradient.cpp
+++ b/src/effects/gradients/SkLinearGradient.cpp
@@ -515,7 +515,8 @@ void SkLinearGradient::LinearGradientContext::shadeSpan16(int x, int y,
 
 #if SK_SUPPORT_GPU
 
-#include "gl/builders/GrGLProgramBuilder.h"
+#include "glsl/GrGLSLCaps.h"
+#include "glsl/GrGLSLFragmentShaderBuilder.h"
 #include "SkGr.h"
 
 /////////////////////////////////////////////////////////////////////
@@ -603,11 +604,11 @@ const GrFragmentProcessor* GrLinearGradient::TestCreate(GrProcessorTestData* d)
 
 void GrGLLinearGradient::emitCode(EmitArgs& args) {
     const GrLinearGradient& ge = args.fFp.cast<GrLinearGradient>();
-    this->emitUniforms(args.fBuilder, ge);
+    this->emitUniforms(args.fUniformHandler, ge);
     SkString t = args.fFragBuilder->ensureFSCoords2D(args.fCoords, 0);
     t.append(".x");
-    this->emitColor(args.fBuilder,
-                    args.fFragBuilder,
+    this->emitColor(args.fFragBuilder,
+                    args.fUniformHandler,
                     args.fGLSLCaps,
                     ge, t.c_str(),
                     args.fOutputColor,