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

ppapi/proxy/ppp_graphics_3d_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_graphics_3d_proxy.h"
 
 #include "ppapi/c/ppp_graphics_3d.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/proxy_lock.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 void ContextLost(PP_Instance instance) {
   HostDispatcher::GetForInstance(instance)->Send(
       new PpapiMsg_PPPGraphics3D_ContextLost(API_ID_PPP_GRAPHICS_3D, instance));
 }
@@ skipping 37 matching lines @@
   IPC_BEGIN_MESSAGE_MAP(PPP_Graphics3D_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPGraphics3D_ContextLost,
                         OnMsgContextLost)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PPP_Graphics3D_Proxy::OnMsgContextLost(PP_Instance instance) {
   if (ppp_graphics_3d_impl_)
-    ppp_graphics_3d_impl_->Graphics3DContextLost(instance);
+    CallWhileUnlocked(ppp_graphics_3d_impl_->Graphics3DContextLost, instance);
 }
 
 }  // namespace proxy
 }  // namespace ppapi