Link MediaSessionTabHelper with native MediaSession [CL is going to be split]

content/browser/web_contents/web_contents_android.h

 // Copyright 2013 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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_ANDROID_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_ANDROID_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 140 matching lines @@
       const base::android::JavaParamRef<jobject>& jobj);
 
   jint GetThemeColor(JNIEnv* env,
                      const base::android::JavaParamRef<jobject>& obj);
 
   void RequestAccessibilitySnapshot(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& callback);
 
-  void ResumeMediaSession(JNIEnv* env,
-                          const base::android::JavaParamRef<jobject>& obj);
-  void SuspendMediaSession(JNIEnv* env,
-                           const base::android::JavaParamRef<jobject>& obj);
-  void StopMediaSession(JNIEnv* env,
-                        const base::android::JavaParamRef<jobject>& obj);
+  // Create a MediaSessionDelegateAndroid object as the native counterpart of
+  // |j_delegate| and link then together, and add it to the MediaSession of this
+  // WebContents object.
+  void AddMediaSessionDelegate(
+      JNIEnv* envm,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& j_delegate);
 
   base::android::ScopedJavaLocalRef<jstring> GetEncoding(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj) const;
 
   // Relay the access from Java layer to GetScaledContentBitmap through JNI.
   void GetContentBitmap(JNIEnv* env,
                         const base::android::JavaParamRef<jobject>& obj,
                         const base::android::JavaParamRef<jobject>& jcallback,
                         const base::android::JavaParamRef<jobject>& color_type,
@@ skipping 45 matching lines @@
   SynchronousCompositorClient* synchronous_compositor_client_;
 
   base::WeakPtrFactory<WebContentsAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_ANDROID_H_