Add a command to lose the context

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 2272 matching lines @@
     'type': 'PUTn',
     'count': 1,
     'data_type': 'GLenum',
     'cmd_args': 'GLenum target, GLsizei count, '
         'const GLenum* attachments',
     'decoder_func': 'DoDiscardFramebufferEXT',
     'unit_test': False,
     'client_test': False,
     'extension': True,
   },
+  'LoseContextCHROMIUM': {
+    'type': 'Manual',
+    'impl_func': True,
+    'extension': True,
+    'chromium': True,
+  },
 }
 
 
 def Grouper(n, iterable, fillvalue=None):
   """Collect data into fixed-length chunks or blocks"""
   args = [iter(iterable)] * n
   return itertools.izip_longest(fillvalue=fillvalue, *args)
 
 
 def SplitWords(input_string):
@@ skipping 1036 matching lines @@
   def WriteImmediateServiceImplementation(self, func, file):
     """Overrriden from TypeHandler."""
     pass
 
   def WriteImmediateFormatTest(self, func, file):
     """Overrriden from TypeHandler."""
     file.Write("// TODO(gman): Implement test for %s\n" % func.name)
 
   def WriteGLES2Implementation(self, func, file):
     """Overrriden from TypeHandler."""
-    pass
+    if func.GetInfo('impl_func'):
+      super(ManualHandler, self).WriteGLES2Implementation(func, file)
 
   def WriteGLES2ImplementationHeader(self, func, file):
     """Overrriden from TypeHandler."""
     file.Write("virtual %s %s(%s) OVERRIDE;\n" %
                (func.return_type, func.original_name,
                 func.MakeTypedOriginalArgString("")))
     file.Write("\n")
 
   def WriteImmediateCmdGetTotalSize(self, func, file):
     """Overrriden from TypeHandler."""
@@ skipping 4197 matching lines @@
     gen.WriteGLES2Header("../../third_party/khronos/GLES2/gl2chromium.h")
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))