Pass decoded picture size from VDA to client

media/video/picture.h

Index: media/video/picture.h
diff --git a/media/video/picture.h b/media/video/picture.h
index d5be2276f2be78ad037bfd045798ebd7f629defb..1b1b395831d6e66631c65dad26cb3c05b5841b0e 100644
--- a/media/video/picture.h
+++ b/media/video/picture.h
@@ -54,7 +54,9 @@ class MEDIA_EXPORT PictureBuffer {
 // This is the media-namespace equivalent of PP_Picture_Dev.
 class MEDIA_EXPORT Picture {
  public:
-  Picture(int32 picture_buffer_id, int32 bitstream_buffer_id);
+  Picture(int32 picture_buffer_id,
+          int32 bitstream_buffer_id,
+          const gfx::Size& size);
 
   // Returns the id of the picture buffer where this picture is contained.
   int32 picture_buffer_id() const {
@@ -70,9 +72,16 @@ class MEDIA_EXPORT Picture {
     bitstream_buffer_id_ = bitstream_buffer_id;
   }
 
+  // Returns the size of the picture. This size may be smaller than the
+  // size of the PictureBuffer, as it is the visible size of the
+  // Picture contained in the PictureBuffer. It is upper left aligned within
+  // PictureBuffer if it is smaller.
+  gfx::Size size() const { return size_; }
+
  private:
   int32 picture_buffer_id_;
   int32 bitstream_buffer_id_;
+  gfx::Size size_;
 };
 
 }  // namespace media