Allow using a larger-than-necessary texture as cached render pass backing

cc/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_SHADER_H_
 #define CC_SHADER_H_
 
 #include "third_party/skia/include/core/SkColorPriv.h"
 #include <string>
 
@@ skipping 67 matching lines @@
 
 class VertexShaderQuad {
 public:
     VertexShaderQuad();
 
     void init(WebKit::WebGraphicsContext3D*, unsigned program, bool usingBindUniform, int* baseUniformIndex);
     std::string getShaderString() const;
 
     int matrixLocation() const { return m_matrixLocation; }
     int pointLocation() const { return m_pointLocation; }
+    int texScaleLocation() const { return m_texScaleLocation; }
 
 private:
     int m_matrixLocation;
     int m_pointLocation;
+    int m_texScaleLocation;
 };
 
 class VertexShaderTile {
 public:
     VertexShaderTile();
 
     void init(WebKit::WebGraphicsContext3D*, unsigned program, bool usingBindUniform, int* baseUniformIndex);
     std::string getShaderString() const;
 
     int matrixLocation() const { return m_matrixLocation; }
@@ skipping 236 matching lines @@
 private:
     int m_alphaLocation;
     int m_texTransformLocation;
     int m_frequencyLocation;
     int m_colorLocation;
 };
 
 } // namespace cc
 
 #endif  // CC_SHADER_H_