Chromecast: Add a way to notify video plane about resolution changes

chromecast/media/cma/backend/video_plane.cc

Index: chromecast/media/cma/backend/video_plane.cc
diff --git a/chromecast/media/cma/backend/video_plane.cc b/chromecast/media/cma/backend/video_plane.cc
index 192fab8735cd788c776ae17c121fd301746efb33..5d8097f2a626073e24cd7778d2e2f58d41326652 100644
--- a/chromecast/media/cma/backend/video_plane.cc
+++ b/chromecast/media/cma/backend/video_plane.cc
@@ -4,6 +4,8 @@
 
 #include "chromecast/media/cma/backend/video_plane.h"
 
+#include "base/memory/singleton.h"
+
 namespace chromecast {
 namespace media {
 
@@ -13,5 +15,40 @@ VideoPlane::VideoPlane() {
 VideoPlane::~VideoPlane() {
 }
 
+class VideoPlaneRegistry {
+ public:
+  static VideoPlaneRegistry* GetInstance() {
+    return Singleton<VideoPlaneRegistry>::get();
+  }
+
+  VideoPlane* GetVideoPlane();
+
+ private:
+  friend struct DefaultSingletonTraits<VideoPlaneRegistry>;
+  friend class Singleton<VideoPlaneRegistry>;
+
+  VideoPlaneRegistry();
+  virtual ~VideoPlaneRegistry();
+
+  scoped_ptr<VideoPlane> video_plane_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoPlaneRegistry);
+};
+
+VideoPlaneRegistry::VideoPlaneRegistry() :
+  video_plane_(CreateVideoPlane()) {
+}
+
+VideoPlaneRegistry::~VideoPlaneRegistry() {
+}
+
+VideoPlane* VideoPlaneRegistry::GetVideoPlane() {
+  return video_plane_.get();
+}
+
+VideoPlane* GetVideoPlane() {
+  return VideoPlaneRegistry::GetInstance()->GetVideoPlane();
+}
+
 }  // namespace media
 }  // namespace chromecast