Update ppapi/ to use scoped_refptr<T>::get() rather than implicit "operator T*"

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/debug/trace_event.h"
@@ skipping 41 matching lines @@
 
 }  // namespace
 
 InstanceData::InstanceData()
     : is_request_surrounding_text_pending(false),
       should_do_request_surrounding_text(false) {
 }
 
 InstanceData::~InstanceData() {
   // Run any pending mouse lock callback to prevent leaks.
-  if (mouse_lock_callback)
+  if (mouse_lock_callback.get())
     mouse_lock_callback->Abort();
 }
 
 PluginDispatcher::PluginDispatcher(PP_GetInterface_Func get_interface,
                                    const PpapiPermissions& permissions,
                                    bool incognito)
     : Dispatcher(get_interface, permissions),
       plugin_delegate_(NULL),
       received_preferences_(false),
       plugin_dispatcher_id_(0),
@@ skipping 287 matching lines @@
     DLOG_IF(INFO, reply_params.sequence() != 0)
         << "Pepper resource reply message received but the resource doesn't "
            "exist (probably has been destroyed).";
     return;
   }
   resource->OnReplyReceived(reply_params, nested_msg);
 }
 
 }  // namespace proxy
 }  // namespace ppapi