GetBufferChangedCallback  187 gpu/command_buffer/service/command_buffer_service.cc     const GetBufferChangedCallback& callback) {
GetBufferChangedCallback   78 gpu/command_buffer/service/command_buffer_service.h       const GetBufferChangedCallback& callback);
GetBufferChangedCallback  100 gpu/command_buffer/service/command_buffer_service.h   GetBufferChangedCallback get_buffer_change_callback_;