Mac Overlays: Plumb through GL solid color overlay support

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/env python
 # 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.
 
 """code generator for GLES2 command buffers."""
 
 import itertools
 import os
 import os.path
@@ skipping 4111 matching lines @@
     'trace_level': 2,
   },
   'ScheduleOverlayPlaneCHROMIUM': {
       'type': 'Custom',
       'impl_func': True,
       'unit_test': False,
       'client_test': False,
       'extension': 'CHROMIUM_schedule_overlay_plane',
       'chromium': True,
   },
+  'ScheduleSolidColorOverlayPlaneCHROMIUM': {
+      'type': 'Custom',
+      'impl_func': True,
+      'unit_test': False,
+      'client_test': False,

[ccameron, 2015/10/08 23:04:30]

This is still using the CHROMIUM_schedule_overlay_plane extension. Should we
consider a different extension? I'd be inclined to say "not yet".

+      'extension': 'CHROMIUM_schedule_overlay_plane',
+      'chromium': True,
+  },
   'MatrixLoadfCHROMIUM': {
     'type': 'PUT',
     'count': 16,
     'data_type': 'GLfloat',
     'decoder_func': 'DoMatrixLoadfCHROMIUM',
     'gl_test_func': 'glMatrixLoadfEXT',
     'chromium': True,
     'extension': 'CHROMIUM_path_rendering',
     'extension_flag': 'chromium_path_rendering',
   },
@@ skipping 6887 matching lines @@
   Format(gen.generated_cpp_filenames)
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))