Update padding/alignment constants to match ffmpeg.

media/base/video_frame_unittest.cc

Index: media/base/video_frame_unittest.cc
diff --git a/media/base/video_frame_unittest.cc b/media/base/video_frame_unittest.cc
index f1afcc8186c18039eceaf4e15bd6a9b415ca4f3b..52766eb5c3b0d448cdeaff9be5a6978b79bd8935 100644
--- a/media/base/video_frame_unittest.cc
+++ b/media/base/video_frame_unittest.cc
@@ -48,12 +48,10 @@ void ExpectFrameColor(media::VideoFrame* yv12_frame, uint32 expect_rgb_color) {
   ASSERT_EQ(PIXEL_FORMAT_YV12, yv12_frame->format());
   ASSERT_EQ(yv12_frame->stride(VideoFrame::kUPlane),
             yv12_frame->stride(VideoFrame::kVPlane));
-  ASSERT_EQ(
-      yv12_frame->coded_size().width() & (VideoFrame::kFrameSizeAlignment - 1),

[chcunningham, 2015/08/10 23:45:36]

I don't think this was asserting the correct thing before (and happened to pass
because of width/height values chosen). The assert fails with my latest changes
and passes after I update it to assert on stride size instead of coded_size

-      0);
-  ASSERT_EQ(
-      yv12_frame->coded_size().height() & (VideoFrame::kFrameSizeAlignment - 1),
-      0);
+  for (size_t plane = 0; plane < 3; ++plane) {
+    ASSERT_EQ(yv12_frame->stride(plane) & (VideoFrame::kFrameSizeAlignment - 1),
+              0);
+  }
 
   size_t bytes_per_row = yv12_frame->coded_size().width() * 4u;
   uint8* rgb_data = reinterpret_cast<uint8*>(