PPAPI: Add unlocking for PPP calls and callbacks. Add more locking.

ppapi/proxy/ppp_mouse_lock_proxy.cc

 // Copyright (c) 2011 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/ppp_mouse_lock_proxy.h"
 
 #include "ppapi/c/ppp_mouse_lock.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/proxy_lock.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 void MouseLockLost(PP_Instance instance) {
   HostDispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   if (!dispatcher) {
     // The dispatcher should always be valid.
@@ skipping 44 matching lines @@
   IPC_BEGIN_MESSAGE_MAP(PPP_MouseLock_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPMouseLock_MouseLockLost,
                         OnMsgMouseLockLost)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PPP_MouseLock_Proxy::OnMsgMouseLockLost(PP_Instance instance) {
   if (ppp_mouse_lock_impl_)
-    ppp_mouse_lock_impl_->MouseLockLost(instance);
+    CallWhileUnlocked(ppp_mouse_lock_impl_->MouseLockLost, instance);
 }
 
 }  // namespace proxy
 }  // namespace ppapi