PPAPI: Make GetProxiedInterface not re-enter the plugin

ppapi/proxy/host_dispatcher.cc

Index: ppapi/proxy/host_dispatcher.cc
diff --git a/ppapi/proxy/host_dispatcher.cc b/ppapi/proxy/host_dispatcher.cc
index ee7e91905b111ee9e5c3d06d82db5e359a05838c..0e821db81dd6428b2eee9f72dca8b31e9f129a46 100644
--- a/ppapi/proxy/host_dispatcher.cc
+++ b/ppapi/proxy/host_dispatcher.cc
@@ -224,10 +224,7 @@ const void* HostDispatcher::GetProxiedInterface(const std::string& iface_name) {
     // Need to query. Cache the result so we only do this once.
     bool supported = false;
 
-    bool previous_reentrancy_value = allow_plugin_reentrancy_;
-    allow_plugin_reentrancy_ = true;
-    Send(new PpapiMsg_SupportsInterface(iface_name, &supported));
-    allow_plugin_reentrancy_ = previous_reentrancy_value;
+    Send(new PpapiMsg_IsInterfaceSupported(iface_name, &supported));
 
     std::pair<PluginSupportedMap::iterator, bool> iter_success_pair;
     iter_success_pair = plugin_supported_.insert(
@@ -274,6 +271,11 @@ void HostDispatcher::OnHostMsgLogWithSource(PP_Instance instance,
   }
 }
 
+void HostDispatcher::OnHostMsgPluginSupportsInterface(
+    const std::string& interface_name) {
+  plugin_supported_[interface_name] = true;
+}
+
 // ScopedModuleReference -------------------------------------------------------
 
 ScopedModuleReference::ScopedModuleReference(Dispatcher* dispatcher)