Hook up RendererMediaSessionManager with browser side

content/renderer/media/android/renderer_media_session_manager.cc

 // 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.
 
 #include "content/renderer/media/android/renderer_media_session_manager.h"
 
 #include "base/logging.h"
+#include "content/common/media/media_session_messages_android.h"
+#include "content/public/renderer/render_thread.h"
 #include "content/renderer/media/android/webmediasession_android.h"
 
 namespace content {
 
 static const int kDefaultMediaSessionID = 0;
 
 RendererMediaSessionManager::RendererMediaSessionManager(
     RenderFrame* render_frame)
     : RenderFrameObserver(render_frame),
       next_session_id_(kDefaultMediaSessionID + 1) {}
 
 RendererMediaSessionManager::~RendererMediaSessionManager() {
   DCHECK(sessions_.empty())
       << "RendererMediaSessionManager is owned by RenderFrameImpl and is "
          "destroyed only after all media sessions are destroyed.";
 }
 
+bool RendererMediaSessionManager::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(RendererMediaSessionManager, msg)
+    IPC_MESSAGE_HANDLER(MediaSessionMsg_DidActivate, OnDidActivate)
+    IPC_MESSAGE_HANDLER(MediaSessionMsg_DidDeactivate, OnDidDeactivate)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
 int RendererMediaSessionManager::RegisterMediaSession(
     WebMediaSessionAndroid* session) {
   sessions_[next_session_id_] = session;
   return next_session_id_++;
 }
 
 void RendererMediaSessionManager::UnregisterMediaSession(int session_id) {
   sessions_.erase(session_id);
 }
 
+void RendererMediaSessionManager::Activate(
+    int session_id,
+    blink::WebMediaSessionActivateCallback* callback) {

[mlamouri (slow - plz ping), 2015/12/09 12:12:19]

nit: maybe this should be a scoped_ptr<> to make the ownership explicit?

[davve, 2015/12/09 14:02:24]

Done.

+  int request_id = pending_activation_requests_.Add(callback);
+  Send(new MediaSessionHostMsg_Activate(routing_id(), session_id, request_id));
+}
+
+void RendererMediaSessionManager::Deactivate(
+    int session_id,
+    blink::WebMediaSessionDeactivateCallback* callback) {

[mlamouri (slow - plz ping), 2015/12/09 12:12:19]

ditto

[davve, 2015/12/09 14:02:24]

Done.

+  int request_id = pending_deactivation_requests_.Add(callback);
+  Send(
+      new MediaSessionHostMsg_Deactivate(routing_id(), session_id, request_id));
+}
+
+void RendererMediaSessionManager::OnDidActivate(int request_id, bool success) {
+  DCHECK(pending_activation_requests_.Lookup(request_id)) << request_id;
+  blink::WebMediaSessionActivateCallback* callback =
+      pending_activation_requests_.Lookup(request_id);
+  if (success)
+    callback->onSuccess();
+  else
+    callback->onError(
+        blink::WebMediaSessionError(blink::WebMediaSessionError::Activate));

[mlamouri (slow - plz ping), 2015/12/09 12:12:19]

style: you need { } if you wrap line.

[davve, 2015/12/09 14:02:24]

Done.

+  pending_activation_requests_.Remove(request_id);
+}
+
+void RendererMediaSessionManager::OnDidDeactivate(int request_id) {
+  DCHECK(pending_deactivation_requests_.Lookup(request_id)) << request_id;
+  pending_deactivation_requests_.Lookup(request_id)->onSuccess();
+  pending_deactivation_requests_.Remove(request_id);
+}
+
 }  // namespace content