Refactor GrGLUniformManager::UniformHandle to initialize itself by default

src/gpu/gl/GrGLProgram.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLProgram_DEFINED
 #define GrGLProgram_DEFINED
@@ skipping 114 matching lines @@
         UniformHandle       fColorFilterUni;
 
         // We use the render target height to provide a y-down frag coord when specifying
         // origin_upper_left is not supported.
         UniformHandle       fRTHeightUni;
 
         // Uniforms for computing texture coords to do the dst-copy lookup
         UniformHandle       fDstCopyTopLeftUni;
         UniformHandle       fDstCopyScaleUni;
         UniformHandle       fDstCopySamplerUni;
-
-        UniformHandles() {
-            fViewMatrixUni = GrGLUniformManager::kInvalidUniformHandle;
-            fColorUni = GrGLUniformManager::kInvalidUniformHandle;
-            fCoverageUni = GrGLUniformManager::kInvalidUniformHandle;
-            fColorFilterUni = GrGLUniformManager::kInvalidUniformHandle;
-            fRTHeightUni = GrGLUniformManager::kInvalidUniformHandle;
-            fDstCopyTopLeftUni = GrGLUniformManager::kInvalidUniformHandle;
-            fDstCopyScaleUni = GrGLUniformManager::kInvalidUniformHandle;
-            fDstCopySamplerUni = GrGLUniformManager::kInvalidUniformHandle;
-        }
     };
 
     typedef SkSTArray<4, UniformHandle, true> SamplerUniSArray;
     typedef SkSTArray<4, int, true> TextureUnitSArray;
 
     struct EffectAndSamplers {
         EffectAndSamplers() : fGLEffect(NULL) {}
         ~EffectAndSamplers() { delete fGLEffect; }
         GrGLEffect*         fGLEffect;
         SamplerUniSArray    fSamplerUnis;  // sampler uni handles for effect's GrTextureAccess
@@ skipping 65 matching lines @@
     GrGLProgramDesc             fDesc;
     const GrGLContext&          fContext;
 
     GrGLUniformManager          fUniformManager;
     UniformHandles              fUniformHandles;
 
     typedef GrRefCnt INHERITED;
 };
 
 #endif