Gamepad: make gamepad events play well with page visibility

Source/platform/AsyncMethodRunner.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 56 matching lines @@
         // FIXME: runAsync should take a TraceLocation and pass it to timer here.
         if (!m_timer.isActive())
             m_timer.startOneShot(0, FROM_HERE);
     }
 
     // If it's scheduled to run the method, cancel it and remember to schedule
     // it again when resume() is called. Mainly for implementing
     // ActiveDOMObject::suspend().
     void suspend()
     {
-        ASSERT(!m_suspended);
+        if (m_suspended)
+            return;

[kbalazs, 2014/07/08 21:01:20]

FYI I have added this to avoid special casing the first pageBecomeVisible that
comes when the view is set up initially.

         m_suspended = true;
 
         if (!m_timer.isActive())
             return;
 
         m_timer.stop();
         m_runWhenResumed = true;
     }
 
     // Resumes pending method run.
     void resume()
     {
-        ASSERT(m_suspended);
+        if (!m_suspended)
+            return;
         m_suspended = false;
 
         if (!m_runWhenResumed)
             return;
 
         m_runWhenResumed = false;
         // FIXME: resume should take a TraceLocation and pass it to timer here.
         m_timer.startOneShot(0, FROM_HERE);
     }
 
@@ skipping 28 matching lines @@
     TargetClass* m_object;
     TargetMethod m_method;
 
     bool m_suspended;
     bool m_runWhenResumed;
 };
 
 }
 
 #endif