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

chromecast/media/cma/backend/video_plane.h

Index: chromecast/media/cma/backend/video_plane.h
diff --git a/chromecast/media/cma/backend/video_plane.h b/chromecast/media/cma/backend/video_plane.h
index 6938b8d3283b7ed7ae908f9c296d7f97280552ce..f3a9c8c111a5de2c9a42b251ff7cc8b196d81e7f 100644
--- a/chromecast/media/cma/backend/video_plane.h
+++ b/chromecast/media/cma/backend/video_plane.h
@@ -6,6 +6,7 @@
 #define CHROMECAST_MEDIA_CMA_BACKEND_VIDEO_PLANE_H_
 
 #include "base/macros.h"
+#include "base/memory/singleton.h"
 
 namespace gfx {
 class QuadF;
@@ -28,8 +29,10 @@ class VideoPlane {
   VideoPlane();
   virtual ~VideoPlane();
 
-  // Gets video plane resolution.
-  virtual gfx::Size GetVideoPlaneResolution() = 0;
+  // Gets output screen resolution.
+  // TODO(servolk): This needs to be removed, get screen resolution from
+  // AVSettings instead.
+  virtual gfx::Size GetScreenResolution() = 0;
 
   // Updates the video plane geometry.
   // |quad.p1()| corresponds to the top left of the original video,
@@ -41,10 +44,21 @@ class VideoPlane {
   virtual void SetGeometry(const gfx::QuadF& quad,
                            CoordinateType coordinate_type) = 0;
 
+  // Should be invoked whenever screen resolution changes (e.g. when a device is
+  // plugged in into a new HDMI port and a new HDMI EDID is received).
+  // VideoPlane should reposition itself according to the new screen resolution.

[gunsch, 2014/12/17 22:45:51]

can a plane be repositioned from a screen size, or only resized?

+  virtual void OnScreenResolutionChanged(const gfx::Size& screen_res) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(VideoPlane);
 };
 
+class VideoPlaneFactory {
+public:
+  // Platform-specific video plane factory
+  static scoped_ptr<VideoPlane> CreatePlatformVideoPlane();
+};
+
 // Global accessor to the video plane.
 VideoPlane* GetVideoPlane();