Media Remoting: Draw remoting interstitial on poster image.

media/remoting/remoting_renderer_controller.cc

Index: media/remoting/remoting_renderer_controller.cc
diff --git a/media/remoting/remoting_renderer_controller.cc b/media/remoting/remoting_renderer_controller.cc
index 5f0d37eacdbc7a5939d49d5b0941e7077d07da8f..a897c07d8c16000cbc90df3b01da34cee9df391f 100644
--- a/media/remoting/remoting_renderer_controller.cc
+++ b/media/remoting/remoting_renderer_controller.cc
@@ -73,6 +73,11 @@ void RemotingRendererController::OnSetCdm(CdmContext* cdm_context) {
   UpdateAndMaybeSwitch();
 }
 
+void RemotingRendererController::OnSetPoster(const GURL& poster) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  poster_ = poster;

[miu, 2016/11/29 22:56:08]

See Model-View-Controller comment in header file. Then, here we want to:

1. If poster image URL changed, initiate download. The download callback will
then check the URL again (to make sure it is the same) and then pass the
resulting SkBitmap to the UI.

2. If poster image URL has become empty, set the empty SkBitmap().

[xjz, 2016/12/02 19:23:11]

Done.

+}
+
 void RemotingRendererController::SetSwitchRendererCallback(
     const base::Closure& cb) {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ -243,4 +248,11 @@ void RemotingRendererController::UpdateAndMaybeSwitch() {
   }
 }
 
+void RemotingRendererController::SetDownloadPosterCallback(
+    const DownloadPosterCallback& cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(download_poster_cb_.is_null());
+  download_poster_cb_ = cb;
+}
+
 }  // namespace media