Enable 2D Canvas painting for Chrome on Android.

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

 // Copyright (c) 2012 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 GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/gpu_export.h"
 
@@ skipping 13 matching lines @@
 
   void Initialize(const gles2::GLES2Decoder* decoder);
   void Destroy();
 
   void DoCopyTexture(const gles2::GLES2Decoder* decoder, GLenum source_target,
                      GLenum dest_target, GLuint source_id, GLuint dest_id,
                      GLint level, GLsizei width, GLsizei height,
                      bool flip_y, bool premultiply_alpha,
                      bool unpremultiply_alpha);
 
+  // This will apply a transform on the source texture before copying to
+  // destination texture.
+  void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
+                     GLenum source_target, GLenum dest_target,

[fgalligan1, 2013/04/04 20:38:10]

Indentation is off. Either line up with "(" or 4 space indent on next line.

[hkuang, 2013/04/04 22:56:45]

Done.

+                     GLuint source_id, GLuint dest_id, GLint level,
+                     GLsizei width, GLsizei height, bool flip_y,
+                     bool premultiply_alpha, bool unpremultiply_alpha,
+                     const GLfloat transform_matrix[16]);

[fgalligan1, 2013/04/04 20:38:10]

16 is meaningless here. Basically you are passing a const GLfloat *. Should
probably change to const GLfloat* transform_matrix.

[hkuang, 2013/04/04 22:56:45]

Keep it as it is now as see the StreamTextureProxyImpl::OnMatrixChanged use this
style to get the matrix. So just keep it. 

+
   // The attributes used during invocation of the extension.
   static const GLuint kVertexPositionAttrib = 0;
 
  private:
   bool initialized_;
 
   static const int kNumPrograms = 12;
   GLuint programs_[kNumPrograms];
   GLuint buffer_id_;
   GLuint framebuffer_;
   GLuint sampler_locations_[kNumPrograms];
 
   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
 };
 
 }  // namespace gpu.
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_