Verify if GPU message pump is signaled when it hangs in WaitForWork

base/message_loop/message_loop.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.
 
 #include "base/message_loop/message_loop.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 
@@ skipping 546 matching lines @@
 #else
     incoming_task_queue_->ReloadWorkQueue(&work_queue_);
 #endif
   }
 }
 
 void MessageLoop::ScheduleWork() {
   pump_->ScheduleWork();
 }
 
+#if defined(OS_WIN)
+bool MessageLoop::MessagePumpWasSignaled() {
+  return pump_->WasSignaled();
+}
+#endif
+
 //------------------------------------------------------------------------------
 // Method and data for histogramming events and actions taken by each instance
 // on each thread.
 
 void MessageLoop::StartHistogrammer() {
 #if !defined(OS_NACL)  // NaCl build has no metrics code.
   if (enable_histogrammer_ && !message_histogram_
       && StatisticsRecorder::IsActive()) {
     std::string thread_name = GetThreadName();
     DCHECK(!thread_name.empty());
@@ skipping 180 matching lines @@
       persistent,
       mode,
       controller,
       delegate);
 }
 #endif
 
 #endif  // !defined(OS_NACL_SFI)
 
 }  // namespace base