Move host resource from the proxy to the shared_impl.

ppapi/proxy/ppb_core_proxy.cc

Index: ppapi/proxy/ppb_core_proxy.cc
diff --git a/ppapi/proxy/ppb_core_proxy.cc b/ppapi/proxy/ppb_core_proxy.cc
index 391a914540086d156c61dcdfef7b08f4cb494e9b..41b330132ab303a8de60dc0bc1cf8988ce76958f 100644
--- a/ppapi/proxy/ppb_core_proxy.cc
+++ b/ppapi/proxy/ppb_core_proxy.cc
@@ -19,6 +19,7 @@
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/time_conversion.h"
 
+using ppapi::HostResource;
 using ppapi::TimeToPPTime;
 using ppapi::TimeTicksToPPTimeTicks;
 
@@ -118,11 +119,11 @@ bool PPB_Core_Proxy::OnMessageReceived(const IPC::Message& msg) {
   return handled;
 }
 
-void PPB_Core_Proxy::OnMsgAddRefResource(HostResource resource) {
+void PPB_Core_Proxy::OnMsgAddRefResource(const HostResource& resource) {
   ppb_core_target()->AddRefResource(resource.host_resource());
 }
 
-void PPB_Core_Proxy::OnMsgReleaseResource(HostResource resource) {
+void PPB_Core_Proxy::OnMsgReleaseResource(const HostResource& resource) {
   ppb_core_target()->ReleaseResource(resource.host_resource());
 }