Clamp YUV videos to their visible size in the shader

cc/output/shader.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_OUTPUT_SHADER_H_
 #define CC_OUTPUT_SHADER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 86 matching lines @@
   VertexShaderPosTexYUVStretchOffset();
 
   void Init(gpu::gles2::GLES2Interface* context,
             unsigned program,
             int* base_uniform_index);
   std::string GetShaderString() const;
 
   int matrix_location() const { return matrix_location_; }
   int tex_scale_location() const { return tex_scale_location_; }
   int tex_offset_location() const { return tex_offset_location_; }
+  int clamp_size_location() const { return clamp_size_location_; }
 
  private:
   int matrix_location_;
   int tex_scale_location_;
   int tex_offset_location_;
+  int clamp_size_location_;
 
   DISALLOW_COPY_AND_ASSIGN(VertexShaderPosTexYUVStretchOffset);
 };
 
 class VertexShaderPos {
  public:
   VertexShaderPos();
 
   void Init(gpu::gles2::GLES2Interface* context,
             unsigned program,
@@ skipping 649 matching lines @@
   int tex_transform_location_;
   int frequency_location_;
   int color_location_;
 
   DISALLOW_COPY_AND_ASSIGN(FragmentShaderCheckerboard);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SHADER_H_