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

ppapi/proxy/ppp_input_event_proxy.cc

Index: ppapi/proxy/ppp_input_event_proxy.cc
diff --git a/ppapi/proxy/ppp_input_event_proxy.cc b/ppapi/proxy/ppp_input_event_proxy.cc
index cfce397403d9608be89d6ae20fdb3554954dcd40..1eb7e8a662c827a12071b5dd7bc16a974e70e878 100644
--- a/ppapi/proxy/ppp_input_event_proxy.cc
+++ b/ppapi/proxy/ppp_input_event_proxy.cc
@@ -98,7 +98,9 @@ void PPP_InputEvent_Proxy::OnMsgHandleInputEvent(PP_Instance instance,
                                                  const InputEventData& data) {
   scoped_refptr<PPB_InputEvent_Shared> resource(new PPB_InputEvent_Shared(
       PPB_InputEvent_Shared::InitAsProxy(), instance, data));
-  ppp_input_event_impl_->HandleInputEvent(instance, resource->pp_resource());
+  CallWhileUnlocked(ppp_input_event_impl_->HandleInputEvent,
+                    instance,
+                    resource->pp_resource());
 }
 
 void PPP_InputEvent_Proxy::OnMsgHandleFilteredInputEvent(
@@ -107,8 +109,9 @@ void PPP_InputEvent_Proxy::OnMsgHandleFilteredInputEvent(
     PP_Bool* result) {
   scoped_refptr<PPB_InputEvent_Shared> resource(new PPB_InputEvent_Shared(
       PPB_InputEvent_Shared::InitAsProxy(), instance, data));
-  *result = ppp_input_event_impl_->HandleInputEvent(instance,
-                                                    resource->pp_resource());
+  *result = CallWhileUnlocked(ppp_input_event_impl_->HandleInputEvent,
+                              instance,
+                              resource->pp_resource());
 }
 
 }  // namespace proxy