Allow reentrancy for HostDispatcher::GetProxiedInterface

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 1137a544c5a08a34f15014d5e77b527ca8b74aa2..82b353e760efe98ad8977b0b13f9a9149b22430b 100644
--- a/ppapi/proxy/host_dispatcher.cc
+++ b/ppapi/proxy/host_dispatcher.cc
@@ -211,7 +211,12 @@ const void* HostDispatcher::GetProxiedInterface(const std::string& interface) {
   if (iter == plugin_if_supported_.end()) {
     // 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(interface, &supported));
+    allow_plugin_reentrancy_ = previous_reentrancy_value;
+
     std::pair<PluginIFSupportedMap::iterator, bool> iter_success_pair;
     iter_success_pair = plugin_if_supported_.insert(
         PluginIFSupportedMap::value_type(interface, supported));
@@ -271,4 +276,3 @@ ScopedModuleReference::~ScopedModuleReference() {
 
 }  // namespace proxy
 }  // namespace pp
-