[Android] Java Bridge: handle requests from Java Script on the background thread

content/browser/android/content_view_core_impl.cc

 // Copyright 2012 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/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 230 matching lines @@
   // Currently, the only use case we have for overriding a user agent involves
   // spoofing a desktop Linux user agent for "Request desktop site".
   // Automatically set it for all WebContents so that it is available when a
   // NavigationEntry requires the user agent to be overridden.
   const char kLinuxInfoStr[] = "X11; Linux x86_64";
   std::string product = content::GetContentClient()->GetProduct();
   std::string spoofed_ua =
       BuildUserAgentFromOSAndProduct(kLinuxInfoStr, product);
   web_contents->SetUserAgentOverride(spoofed_ua);
 
-  java_bridge_dispatcher_host_.reset(
+  java_bridge_dispatcher_host_ =
       new GinJavaBridgeDispatcherHost(web_contents,
-                                      java_bridge_retained_object_set));
+                                      java_bridge_retained_object_set);
 
   InitWebContents();
 }
 
 ContentViewCoreImpl::~ContentViewCoreImpl() {
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
   java_ref_.reset();
   if (!j_obj.is_null()) {
     Java_ContentViewCore_onNativeContentViewCoreDestroyed(
@@ skipping 1074 matching lines @@
       reinterpret_cast<ui::WindowAndroid*>(window_android),
       retained_objects_set);
   return reinterpret_cast<intptr_t>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content