PPAPI: Make CompletionCallbacks work right on background threads.

webkit/plugins/ppapi/host_globals.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 "webkit/plugins/ppapi/host_globals.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 160 matching lines @@
       GetAllContainersForModule(i->second, &containers);
     }
   }
 
   WebConsoleMessage message = MakeLogMessage(level, source, value);
   for (ContainerSet::iterator i = containers.begin();
        i != containers.end(); ++i)
      (*i)->element().document().frame()->addMessageToConsole(message);
 }
 
+::ppapi::MessageLoopShared* HostGlobals::GetCurrentMessageLoop() {
+  return NULL;
+}
+
 PP_Module HostGlobals::AddModule(PluginModule* module) {
 #ifndef NDEBUG
   // Make sure we're not adding one more than once.
   for (ModuleMap::const_iterator i = module_map_.begin();
        i != module_map_.end(); ++i)
     DCHECK(i->second != module);
 #endif
 
   // See AddInstance.
   PP_Module new_module;
@@ skipping 66 matching lines @@
     return NULL;
   return found->second;
 }
 
 bool HostGlobals::IsHostGlobals() const {
   return true;
 }
 
 }  // namespace ppapi
 }  // namespace webkit