PPAPI: Make blocking completion callbacks work.

ppapi/proxy/plugin_dispatcher.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 "ppapi/proxy/plugin_dispatcher.h"
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 27 matching lines @@
 
 typedef std::map<PP_Instance, PluginDispatcher*> InstanceToDispatcherMap;
 InstanceToDispatcherMap* g_instance_to_dispatcher = NULL;
 
 typedef std::set<PluginDispatcher*> DispatcherSet;
 DispatcherSet* g_live_dispatchers = NULL;
 
 }  // namespace
 
 InstanceData::InstanceData()
-    : flash_fullscreen(PP_FALSE),
-      mouse_lock_callback(PP_BlockUntilComplete()) {
+    : flash_fullscreen(PP_FALSE) {
 }
 
 InstanceData::~InstanceData() {
   // Run any pending mouse lock callback to prevent leaks.
-  if (mouse_lock_callback.func) {
-    CallWhileUnlocked(PP_RunAndClearCompletionCallback,
-                      &mouse_lock_callback,
-                      static_cast<int32_t>(PP_ERROR_ABORTED));
-  }
+  if (mouse_lock_callback)
+    mouse_lock_callback->Abort();
 }
 
 PluginDispatcher::PluginDispatcher(base::ProcessHandle remote_process_handle,
                                    PP_GetInterface_Func get_interface)
     : Dispatcher(remote_process_handle, get_interface),
       plugin_delegate_(NULL),
       received_preferences_(false),
       plugin_dispatcher_id_(0) {
   SetSerializationRules(new PluginVarSerializationRules(AsWeakPtr()));
 
@@ skipping 222 matching lines @@
   // once they're set. The user will have to restart to get new font prefs
   // propogated to plugins.
   if (!received_preferences_) {
     received_preferences_ = true;
     preferences_ = prefs;
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi