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

content/browser/web_contents/web_contents_android.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_android.h"
 
 #include <stdint.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "content/browser/accessibility/browser_accessibility_android.h"
 #include "content/browser/accessibility/browser_accessibility_manager_android.h"
 #include "content/browser/android/content_view_core_impl.h"
 #include "content/browser/android/interstitial_page_delegate_android.h"
 #include "content/browser/frame_host/interstitial_page_impl.h"
 #include "content/browser/media/android/browser_media_player_manager.h"
 #include "content/browser/media/android/media_web_contents_observer_android.h"
+#include "content/browser/media/session/media_session.h"
+#include "content/browser/media/session/media_session_delegate_android.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/devtools_messages.h"
 #include "content/common/frame_messages.h"
 #include "content/common/input_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/android/app_web_message_port_service.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/message_port_provider.h"
@@ skipping 572 matching lines @@
   // base::Callback.
   ScopedJavaGlobalRef<jobject> j_callback;
   j_callback.Reset(env, callback);
 
   WebContentsImpl::AXTreeSnapshotCallback snapshot_callback =
       base::Bind(&AXTreeSnapshotCallback, j_callback);
   static_cast<WebContentsImpl*>(web_contents_)->RequestAXTreeSnapshot(
       snapshot_callback);
 }
 
-void WebContentsAndroid::ResumeMediaSession(JNIEnv* env,
-                                            const JavaParamRef<jobject>& obj) {
-  web_contents_->ResumeMediaSession();
-}
-
-void WebContentsAndroid::SuspendMediaSession(JNIEnv* env,
-                                             const JavaParamRef<jobject>& obj) {
-  web_contents_->SuspendMediaSession();
-}
-
-void WebContentsAndroid::StopMediaSession(JNIEnv* env,
-                                          const JavaParamRef<jobject>& obj) {
-  web_contents_->StopMediaSession();
+void WebContentsAndroid::AddMediaSessionDelegate(

[whywhat, 2016/10/21 18:28:15]

When is the delegate going to be removed?
Do you think we could create the delegate in advance in WCA? Does it have to be
on demand?

+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jobject>& j_delegate) {
+  MediaSessionDelegateAndroid::CreateAndConnect(
+      MediaSession::Get(web_contents()), env, j_delegate);
 }
 
 ScopedJavaLocalRef<jstring> WebContentsAndroid::GetEncoding(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) const {
   return base::android::ConvertUTF8ToJavaString(env,
                                                 web_contents_->GetEncoding());
 }
 
 void WebContentsAndroid::GetContentBitmap(
@@ skipping 88 matching lines @@
     Java_WebContentsImpl_addToBitmapList(env, jbitmaps, jbitmap);
   }
   for (const gfx::Size& size : sizes) {
     Java_WebContentsImpl_createSizeAndAddToList(env, jsizes, size.width(),
                                                 size.height());
   }
   Java_WebContentsImpl_onDownloadImageFinished(
       env, *obj, *callback, id, http_status_code, jurl, jbitmaps, jsizes);
 }
 }  // namespace content