Do not start RunLoop of MessagePumpForUI in NestedMessagePumpAndroid

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/allocator/allocator_shim.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
@@ skipping 275 matching lines @@
       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
       // the actual browser.
-      base::MessageLoop::current()->QuitNow();
+      if (base::MessageLoop::current()->is_running())
+        base::MessageLoop::current()->QuitNow();
   #endif
       main_loop_.reset(NULL);
 
       notification_service_.reset(NULL);
 
       is_shutdown_ = true;
     }
   }
 
  protected:
@@ skipping 11 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 };
 
 // static
 BrowserMainRunner* BrowserMainRunner::Create() {
   return new BrowserMainRunnerImpl();
 }
 
 }  // namespace content