Create GLSLUniformHandler class for gpu backend

src/gpu/glsl/GrGLSLProgramBuilder.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "glsl/GrGLSLProgramBuilder.h"
 
 const int GrGLSLProgramBuilder::kVarsPerBlock = 8;
@@ skipping 16 matching lines @@
         if (out->endsWith('_')) {
             // Names containing "__" are reserved.
             out->append("x");
         }
         out->appendf("_Stage%d%s", fStageIndex, fFS.getMangleString().c_str());
     }
 }
 
 void GrGLSLProgramBuilder::appendUniformDecls(ShaderVisibility visibility,
                                               SkString* out) const {
-    this->onAppendUniformDecls(visibility, out);
+    this->uniformHandler()->appendUniformDecls(visibility, out);
 }
 
+void GrGLSLProgramBuilder::addRTAdjustmentUniform(GrSLPrecision precision,
+                                                  const char* name,
+                                                  const char** outName) {
+        SkASSERT(!fUniformHandles.fRTAdjustmentUni.isValid());
+        fUniformHandles.fRTAdjustmentUni =
+            this->uniformHandler()->addUniform(GrGLSLUniformHandler::kVertex_Visibility,
+                                               kVec4f_GrSLType,
+                                               precision,
+                                               name,
+                                               outName);
+}
+
+void GrGLSLProgramBuilder::addRTHeightUniform(const char* name, const char** outName) {
+        SkASSERT(!fUniformHandles.fRTHeightUni.isValid());
+        GrGLSLUniformHandler* uniformHandler = this->uniformHandler();
+        fUniformHandles.fRTHeightUni =
+            uniformHandler->internalAddUniformArray(GrGLSLUniformHandler::kFragment_Visibility,
+                                                    kFloat_GrSLType, kDefault_GrSLPrecision,
+                                                    name, false, 0, outName);
+}
+