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..c2b6c53f96b77ff324d148ba6781e3a8c6b49f53 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -223,6 +223,10 @@ 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.
+  // The height may be aligned to format requirements.
+  static int Rows(size_t plane, Format format, int height);

[Tom Sepez, 2014/09/02 16:57:15]

nit: could the result be negative?  If not, why are we using signed types here?

+
   Format format() const { return format_; }
 
   const gfx::Size& coded_size() const { return coded_size_; }