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

base/message_loop/message_pump_win.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 "base/message_loop/message_pump_win.h"
 
 #include <math.h>
 #include <stdint.h>
 
 #include <limits>
 
+#include "base/debug/crash_logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "base/win/current_module.h"
 #include "base/win/wrapped_window_proc.h"
 
 namespace base {
 
@@ skipping 607 matching lines @@
     }
   }
 }
 
 bool MessagePumpForGpu::ProcessNextMessage() {
   MSG msg;
   if (!g_peek_message(&msg, nullptr, 0, 0, PM_REMOVE))
     return false;
 
   if (msg.message == WM_QUIT) {
+    // Try to figure out if we've received a WM_QUIT targeted towards a
+    // window. http://crbug.com/647068
+    // TODO(jbauman): Remove once we've got some data about this.
+    base::debug::SetCrashKeyValue("received_quit_message",
+                                  base::StringPrintf("%d", !!msg.hwnd));
     // Repost the QUIT message so that it will be retrieved by the primary
     // GetMessage() loop.
     state_->should_quit = true;
     g_post_quit(static_cast<int>(msg.wParam));
     return false;
   }
 
   if (!g_call_msg_filter(const_cast<MSG*>(&msg), kMessageFilterCode)) {
     g_translate_message(&msg);
     g_dispatch_message(&msg);
@@ skipping 174 matching lines @@
     if (!filter || it->handler == filter) {
       *item = *it;
       completed_io_.erase(it);
       return true;
     }
   }
   return false;
 }
 
 }  // namespace base