Cache pending JS bridge sync IPC replies, and send in case of RenderFrame deletion.

content/browser/android/java/gin_java_bridge_dispatcher_host.h

Index: content/browser/android/java/gin_java_bridge_dispatcher_host.h
diff --git a/content/browser/android/java/gin_java_bridge_dispatcher_host.h b/content/browser/android/java/gin_java_bridge_dispatcher_host.h
index 615c2b03770af4197ec1a0799a0cfe3bc4191b65..dc3ee5f3932988438394b9f8049eb9353bb04a6b 100644
--- a/content/browser/android/java/gin_java_bridge_dispatcher_host.h
+++ b/content/browser/android/java/gin_java_bridge_dispatcher_host.h
@@ -114,6 +114,12 @@ class GinJavaBridgeDispatcherHost
   typedef std::map<std::string, GinJavaBoundObject::ObjectID> NamedObjectMap;
   NamedObjectMap named_objects_;
 
+  // Keep track of pending calls out to Java such that we can send a synchronous
+  // reply to the renderer waiting on the response should the RenderFrame be
+  // destroyed while the reply is pending.
+  // Only used on the UI thread.
+  std::map<RenderFrameHost*, IPC::Message*> pending_replies_;

[boliu, 2014/08/22 21:05:17]

nit, typedef the type to save typing

[benm (inactive), 2014/08/26 15:42:40]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(GinJavaBridgeDispatcherHost);
 };