[Android] Fix GinJavaBridgeMessageFilter registration issue in Java Bridge.

content/browser/android/java/gin_java_bridge_message_filter.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/java/gin_java_bridge_message_filter.h"
 
 #include "base/auto_reset.h"
 #include "build/build_config.h"
 #include "content/browser/android/java/gin_java_bridge_dispatcher_host.h"
 #include "content/browser/android/java/java_bridge_thread.h"
@@ skipping 150 matching lines @@
 }
 
 void GinJavaBridgeMessageFilter::OnObjectWrapperDeleted(
     GinJavaBoundObject::ObjectID object_id) {
   DCHECK(JavaBridgeThread::CurrentlyOn());
   GinJavaBridgeDispatcherHost* host = FindHost();
   if (host)
     host->OnObjectWrapperDeleted(current_routing_id_, object_id);
 }
 
+void GinJavaBridgeMessageFilter::RemoveUserData(
+    const GinJavaBridgeDispatcherHost* host) {
+  DCHECK(host);

[mnaganov (inactive), 2015/12/29 16:55:28]

DCHECK is not needed here, filter's only client is GinJavaBridgeDispatcherHost,
and we trust it.

[Pritam Nikam, 2015/12/30 12:05:36]

Done.

+  RenderProcessHost* rph = host->web_contents()->GetRenderProcessHost();
+  DCHECK(rph);

[mnaganov (inactive), 2015/12/29 16:55:28]

This DCHECK is also not needed because would `rph` happen to be nullptr, it will
be obvious from a crash dump when we try to access it on the next line.

[Pritam Nikam, 2015/12/30 12:05:36]

Done.

+  rph->RemoveUserData(kGinJavaBridgeMessageFilterKey);
+}
+
 }  // namespace content