Revert 175233 because Linux ASAN builder cannot compile it.

ppapi/shared_impl/ppb_instance_shared.cc

 // 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.
 
 #include "ppapi/shared_impl/ppb_instance_shared.h"
 
 #include <string>
 
-#include "base/debug/trace_event.h"
-#include "base/threading/platform_thread.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_input_event.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/ppb_image_data_shared.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 
 namespace ppapi {
 
@@ skipping 73 matching lines @@
     return false;
 
   // Validate the hot spot location.
   if (hot_spot->x < 0 || hot_spot->x >= desc.size.width ||
       hot_spot->y < 0 || hot_spot->y >= desc.size.height)
     return false;
   return true;
 }
 
 }  // namespace ppapi