Avoid type truncation warnings when converting GLenum to GLboolean by inserting

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 5849 matching lines @@
       file.Write("  }\n")
       file.Write("  *result = 0;\n")
       arg_string = func.MakeOriginalArgString("")
       comma = ""
       if len(arg_string) > 0:
         comma = ", "
       file.Write(
           "  helper_->%s(%s%sGetResultShmId(), GetResultShmOffset());\n" %
                  (func.name, arg_string, comma))
       file.Write("  WaitForCmd();\n")
-      file.Write("  %s result_value = *result;\n" % func.return_type)
-      file.Write('  GPU_CLIENT_LOG("returned " << result_value);\n')
+      file.Write("  %s result_value = *result" % func.return_type)
+      if func.return_type == "GLboolean":
+        file.Write(" != 0")
+      file.Write(';\n  GPU_CLIENT_LOG("returned " << result_value);\n')
       file.Write("  CheckGLError();\n")
       file.Write("  return result_value;\n")
       file.Write("}\n")
       file.Write("\n")
 
   def WriteGLES2ImplementationUnitTest(self, func, file):
     """Overrriden from TypeHandler."""
     client_test = func.GetInfo('client_test')
     if client_test == None or client_test == True:
       code = """
@@ skipping 2761 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:]))