gpu: Do not relaunch the process during teardown.

content/browser/browser_main_runner.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 "content/public/browser/browser_main_runner.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/leak_annotations.h"
@@ skipping 26 matching lines @@
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "ui/base/win/scoped_ole_initializer.h"
 #include "ui/gfx/win/direct_write.h"
 #endif
 
 namespace content {
 
 namespace {
 
-bool g_exited_main_message_loop = false;
+base::LazyInstance<base::AtomicFlag>::Leaky g_exited_main_message_loop;
 const char kMainThreadName[] = "CrBrowserMain";
 
 }  // namespace
 
 class BrowserMainRunnerImpl : public BrowserMainRunner {
  public:
   BrowserMainRunnerImpl()
       : initialization_started_(false), is_shutdown_(false) {}
 
   ~BrowserMainRunnerImpl() override {
@@ skipping 130 matching lines @@
         *base::CommandLine::ForCurrentProcess();
     std::unique_ptr<BrowserShutdownProfileDumper> shutdown_profiler;
     if (command_line.HasSwitch(switches::kTraceShutdown)) {
       shutdown_profiler.reset(new BrowserShutdownProfileDumper(
           BrowserShutdownProfileDumper::GetShutdownProfileFileName()));
     }
 
     {
       // The trace event has to stay between profiler creation and destruction.
       TRACE_EVENT0("shutdown", "BrowserMainRunner");
-      g_exited_main_message_loop = true;
+      g_exited_main_message_loop.Get().Set();
 
       main_loop_->ShutdownThreadsAndCleanUp();
 
       ui::ShutdownInputMethod();
   #if defined(OS_WIN)
       ole_initializer_.reset(NULL);
   #endif
   #if defined(OS_ANDROID)
       // Forcefully terminates the RunLoop inside MessagePumpForUI, ensuring
       // proper shutdown for content_browsertests. Shutdown() is not used by
@@ skipping 26 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 };
 
 // static
 BrowserMainRunner* BrowserMainRunner::Create() {
   return new BrowserMainRunnerImpl();
 }
 
 // static
 bool BrowserMainRunner::ExitedMainMessageLoop() {
-  return g_exited_main_message_loop;
+  return !(g_exited_main_message_loop == nullptr) &&
+         g_exited_main_message_loop.Get().IsSet();
 }
 
 }  // namespace content