Make VEA test support videos with different coded size and visible size

media/base/video_frame.h

Index: media/base/video_frame.h
diff --git a/media/base/video_frame.h b/media/base/video_frame.h
index 9ad9a3d937229756340ac5d0371a9dac832cd81c..2de2fc44fde66b9f75dd5e23ede983f114775c0a 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -223,6 +223,9 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
   // The width may be aligned to format requirements.
   static int RowBytes(size_t plane, Format format, int width);
 
+  // Returns the number of rows for the given plane, format, and height.

[wuchengli, 2014/08/27 05:46:25]

Add "The height may be aligned to format requirements." See Pawel's explanation
in
https://chromiumcodereview.appspot.com/406893002/diff/100001/media/base/video...

+  static int Rows(size_t plane, Format format, int height);
+
   Format format() const { return format_; }
 
   const gfx::Size& coded_size() const { return coded_size_; }