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 eaf618a0ddcab1cb02748692f1f6e3d91384e6a8..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 {
 
@@ -103,14 +99,6 @@
   EGLNativeDisplayType display_id_;
 
   bool is_initialized_;
-
-// elg::Display is used for comformance tests and command_buffer_gles.  We can't
-// include the exit manager for the conformance tests.
-// TODO(hendrikw): Find a cleaner solution for this.
-#if !defined(GLES2_CONFORM_SUPPORT_ONLY)
-  scoped_ptr<base::AtExitManager> exit_manager_;
-#endif  // !GLES2_CONFORM_SUPPORT_ONLY
-
   bool create_offscreen_;
   int create_offscreen_width_;
   int create_offscreen_height_;