Fix for jankiness in some accelerated 2D canvas demos: If there is already a...

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/python
 #
 # Copyright (c) 2006-2009 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.
 
 """code generator for GLES2 command buffers."""
 
 import os
 import os.path
@@ skipping 1564 matching lines @@
     'data_type': 'GLfloat',
     'count': 4,
     'decoder_func': 'DoVertexAttrib4fv',
   },
   'VertexAttribPointer': {
       'type': 'Manual',
       'cmd_args': 'GLuint indx, GLint size, GLenum type, GLboolean normalized, '
                   'GLsizei stride, GLuint offset',
   },
   'CopyTextureToParentTextureCHROMIUM': {
+      'impl_func': False,
       'decoder_func': 'DoCopyTextureToParentTextureCHROMIUM',
       'unit_test': False,
       'extension': True,
       'chromium': True,
   },
   'ResizeCHROMIUM': {
       'decoder_func': 'DoResizeCHROMIUM',
       'unit_test': False,
       'extension': True,
       'chromium': True,
@@ skipping 3722 matching lines @@
       if not func.IsCoreGLFunction():
         continue
 
       original_arg = func.MakeTypedOriginalArgString("")
       context_arg = "PP_Resource context_id"
       if len(original_arg):
         arg = context_arg + ", " + original_arg
       else:
         arg = context_arg
       file.Write("%s %s(%s) {\n" % (func.return_type, func.name, arg))
-      
+
       file.Write("""  scoped_refptr<PPB_Context3D_Impl> context =
       Resource::GetAs<PPB_Context3D_Impl>(context_id);
 """)
 
       return_str = "" if func.return_type == "void" else "return "
       file.Write("  %scontext->gles2_impl()->%s(%s);\n" %
                  (return_str, func.original_name,
                   func.MakeOriginalArgString("")))
       file.Write("}\n\n")
 
@@ skipping 100 matching lines @@
 
     if options.generate_docs:
       gen.WriteDocs("docs/gles2_cmd_format_docs_autogen.h")
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     sys.exit(1)
 
 if __name__ == '__main__':
   main(sys.argv[1:])