Move MessagePort implementation from android_webview to content

content/browser/android/app_web_message_port_service_impl.h

 // 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.
 
-#ifndef ANDROID_WEBVIEW_NATIVE_AW_MESSAGE_PORT_SERVICE_IMPL_H_
-#define ANDROID_WEBVIEW_NATIVE_AW_MESSAGE_PORT_SERVICE_IMPL_H_
+#ifndef CONTENT_BROWSER_ANDROID_APP_WEB_MESSAGE_PORT_SERVICE_IMPL_H_
+#define CONTENT_BROWSER_ANDROID_APP_WEB_MESSAGE_PORT_SERVICE_IMPL_H_
 
-#include <jni.h>
 #include <map>
 
-#include "android_webview/browser/aw_message_port_service.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
 #include "base/strings/string16.h"
+#include "content/public/browser/android/app_web_message_port_service.h"
 
-namespace android_webview {
 
-// This class is the native peer of AwMessagePortService.java. Please see the
-// java class for an explanation of use, ownership and lifetime.
+namespace content {
+class AppWebMessagePortMessageFilter;
+
+// This class is the native peer of AppWebMessagePortService.java.
+// Please see the java class for an explanation of use, ownership and lifetime.
 

[sgurun-gerrit only, 2016/09/30 23:40:59]

do the notes in java class still apply after this move?

[Yusuf, 2016/10/04 21:33:14]

Yes!

 // Threading: Created and initialized on UI thread. For other methods, see
 // the method level DCHECKS or documentation.
-class AwMessagePortServiceImpl : public AwMessagePortService {
+class AppWebMessagePortServiceImpl : public AppWebMessagePortService {
  public:
-  static AwMessagePortServiceImpl* GetInstance();
 
-  AwMessagePortServiceImpl();
-  ~AwMessagePortServiceImpl() override;
+  // Returns the AppWebMessagePortServiceImpl singleton.
+  static AppWebMessagePortServiceImpl* GetInstance();
+
+  AppWebMessagePortServiceImpl();
+  ~AppWebMessagePortServiceImpl() override;
   void Init(JNIEnv* env, jobject object);
 
-  void CreateMessageChannel(JNIEnv* env, jobjectArray ports,
-      scoped_refptr<AwMessagePortMessageFilter> filter);
+  // AppWebMessagePortService implementation
 
-  // AwMessagePortService implementation
+  void CreateMessageChannel(
+      JNIEnv* env, jobjectArray ports, WebContents* web_contents) override;
   void OnConvertedWebToAppMessage(
       int message_port_id,
       const base::ListValue& message,
       const std::vector<int>& sent_message_port_ids) override;
-  void OnMessagePortMessageFilterClosing(
-      AwMessagePortMessageFilter* filter) override;
   void CleanupPort(int message_port_id) override;
 
+  void RemoveSentPorts(const std::vector<int>& sent_ports) override;

[sgurun-gerrit only, 2016/09/30 23:40:59]

private

[Yusuf, 2016/10/04 21:33:14]

Got rid of override, but had to keep it public since MessagePortProvider calls
it in the impl class still.

   // Methods called from Java.
   void PostAppToWebMessage(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& object,
       int sender_id,
       const base::android::JavaParamRef<jstring>& message,
       const base::android::JavaParamRef<jintArray>& sent_ports);
   void ClosePort(JNIEnv* env,
                  const base::android::JavaParamRef<jobject>& object,
                  int message_port_id);
   void ReleaseMessages(JNIEnv* env,
                        const base::android::JavaParamRef<jobject>& object,
                        int message_port_id);
 
-  void RemoveSentPorts(const std::vector<int>& sent_ports);
+  void OnMessagePortMessageFilterClosing(
+      AppWebMessagePortMessageFilter* filter);
 
 private:
+  friend struct base::DefaultSingletonTraits<AppWebMessagePortServiceImpl>;
+
   void PostAppToWebMessageOnIOThread(
       int sender_id,
       base::string16* message,
       std::vector<int>* sent_ports);
   void CreateMessageChannelOnIOThread(
-      scoped_refptr<AwMessagePortMessageFilter> filter,
+      scoped_refptr<AppWebMessagePortMessageFilter> filter,
       int* port1,
       int* port2);
   void OnMessageChannelCreated(
       base::android::ScopedJavaGlobalRef<jobjectArray>* ports,
       int* port1,
       int* port2);
-  void AddPort(int message_port_id, AwMessagePortMessageFilter* filter);
+  void AddPort(int message_port_id, AppWebMessagePortMessageFilter* filter);
   void PostClosePortMessage(int message_port_id);
 
   JavaObjectWeakGlobalRef java_ref_;
-  typedef std::map<int, AwMessagePortMessageFilter*> MessagePorts;
+  typedef std::map<int, AppWebMessagePortMessageFilter*> MessagePorts;
   MessagePorts ports_; // Access on IO thread
 
-  DISALLOW_COPY_AND_ASSIGN(AwMessagePortServiceImpl);
+  DISALLOW_COPY_AND_ASSIGN(AppWebMessagePortServiceImpl);
 };
 
-bool RegisterAwMessagePortService(JNIEnv* env);
+bool RegisterAppWebMessagePortService(JNIEnv* env);
 
-}  // namespace android_webview
+}  // namespace content
 
-#endif  // ANDROID_WEBVIEW_NATIVE_AW_MESSAGE_PORT_SERVICE_IMPL_H_
+#endif  // CONTENT_BROWSER_ANDROID_APP_WEB_MESSAGE_PORT_SERVICE_IMPL_H_