MapImageCHROMIUMHelper 4027 gpu/command_buffer/client/gles2_implementation.cc   void* mapped = MapImageCHROMIUMHelper(image_id, access);
MapImageCHROMIUMHelper  549 gpu/command_buffer/client/gles2_implementation.h   void* MapImageCHROMIUMHelper(GLuint image_id, GLenum access);