Fix two notification update issues on page navigation

content/browser/media/session/media_session_service_impl.cc

 // Copyright 2016 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/media/session/media_session_service_impl.h"
 
 #include "content/browser/media/session/media_metadata_sanitizer.h"
 #include "content/browser/media/session/media_session_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 25 matching lines @@
   MediaSessionServiceImpl* impl =
       new MediaSessionServiceImpl(render_frame_host);
   impl->Bind(std::move(request));
 }
 
 RenderFrameHost* MediaSessionServiceImpl::GetRenderFrameHost() {
   return RenderFrameHost::FromID(render_frame_process_id_,
                                  render_frame_routing_id_);
 }
 
+void MediaSessionServiceImpl::DidFinishNavigation() {
+  // At this point the BrowsingContext of the frame has changed, so the members
+  // need to be reset, and notify MediaSessionImpl.
+  SetPlaybackState(blink::mojom::MediaSessionPlaybackState::NONE);
+  SetMetadata(base::nullopt);
+  ClearActions();
+}
+
 void MediaSessionServiceImpl::SetClient(
     blink::mojom::MediaSessionClientPtr client) {
   client_ = std::move(client);
 }
 
 void MediaSessionServiceImpl::SetPlaybackState(
     blink::mojom::MediaSessionPlaybackState state) {
   playback_state_ = state;
   MediaSessionImpl* session = GetMediaSession();
   if (session)
@@ skipping 29 matching lines @@
 }
 
 void MediaSessionServiceImpl::DisableAction(
     blink::mojom::MediaSessionAction action) {
   actions_.erase(action);
   MediaSessionImpl* session = GetMediaSession();
   if (session)
     session->OnMediaSessionActionsChanged(this);
 }
 
+void MediaSessionServiceImpl::ClearActions() {
+  actions_.clear();
+  MediaSessionImpl* session = GetMediaSession();
+  if (session)
+    session->OnMediaSessionActionsChanged(this);
+}
+
 MediaSessionImpl* MediaSessionServiceImpl::GetMediaSession() {
   RenderFrameHost* rfh = GetRenderFrameHost();
   if (!rfh)
     return nullptr;
 
   WebContentsImpl* contents =
       static_cast<WebContentsImpl*>(WebContentsImpl::FromRenderFrameHost(rfh));
   if (!contents)
     return nullptr;
 
   return MediaSessionImpl::Get(contents);
 }
 
 void MediaSessionServiceImpl::Bind(
     blink::mojom::MediaSessionServiceRequest request) {
   binding_.reset(new mojo::Binding<blink::mojom::MediaSessionService>(
       this, std::move(request)));
 }
 
 }  // namespace content