Enable 2D Canvas painting for Chrome on Android.

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

Index: gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
diff --git a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
index 2d607bf556c79a9ffb1527b6ba35727bd802b468..03401c507c952506c2e13a2e145da4af0430fd22 100644
--- a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
+++ b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
@@ -31,6 +31,15 @@ class GPU_EXPORT CopyTextureCHROMIUMResourceManager {
                      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;