Revert of Set crash key if WM_QUIT message is received on GPU message loop.

chrome/app/chrome_crash_reporter_client_win.cc

 // Copyright 2013 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.
 
 // TODO(ananta/scottmg)
 // Add test coverage for Crashpad.
 #include "chrome/app/chrome_crash_reporter_client_win.h"
 
 #include <assert.h>
 #include <windows.h>
@@ skipping 161 matching lines @@
       {"swdh_register_cannot_scope_url", crash_keys::kLargeSize},
       {"swdh_register_cannot_script_url", crash_keys::kLargeSize},
 
       // Temporary for https://crbug.com/619294.
       {"swdh_unregister_cannot_host_url", crash_keys::kLargeSize},
       {"swdh_unregister_cannot_scope_url", crash_keys::kLargeSize},
 
       // Temporary for https://crbug.com/630496.
       {"swdh_get_registration_cannot_host_url", crash_keys::kLargeSize},
       {"swdh_get_registration_cannot_document_url", crash_keys::kLargeSize},
-
-      // Temporary for https://crbug.com/647068.
-      {"received_quit_message", crash_keys::kSmallSize},
   };
 
   // This dynamic set of keys is used for sets of key value pairs when gathering
   // a collection of data, like command line switches or extension IDs.
   std::vector<base::debug::CrashKey> keys(fixed_keys,
                                           fixed_keys + arraysize(fixed_keys));
 
   crash_keys::GetCrashKeysForCommandLineSwitches(&keys);
 
   // Register the extension IDs.
@@ skipping 184 matching lines @@
 bool ChromeCrashReporterClient::GetCollectStatsInSample() {
   return install_static::GetCollectStatsInSample();
 }
 
 bool ChromeCrashReporterClient::EnableBreakpadForProcess(
     const std::string& process_type) {
   return process_type == install_static::kRendererProcess ||
          process_type == install_static::kPpapiPluginProcess ||
          process_type == install_static::kGpuProcess;
 }