Revert of Add command_buffer_gles2

gpu/gles2_conform_support/egl/display.h

Index: gpu/gles2_conform_support/egl/display.h
diff --git a/gpu/gles2_conform_support/egl/display.h b/gpu/gles2_conform_support/egl/display.h
index 2202a96fbaa49fcee387f6d6f47f6e7a36e6e347..adf39490f734c00f2b4ba35112fbe3434d4c9b94 100644
--- a/gpu/gles2_conform_support/egl/display.h
+++ b/gpu/gles2_conform_support/egl/display.h
@@ -29,10 +29,6 @@
 class GLES2Implementation;
 }  // namespace gles2
 }  // namespace gpu
-
-namespace base {
-class AtExitManager;
-}  // namespace base
 
 namespace egl {
 
@@ -108,7 +104,6 @@
   int create_offscreen_height_;
 
   scoped_refptr<gpu::TransferBufferManagerInterface> transfer_buffer_manager_;
-  scoped_ptr<base::AtExitManager> exit_manager_;
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::GpuScheduler> gpu_scheduler_;
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder_;