Replace av_malloc with AlignedAlloc for memory allocation in VideoFrame.

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 09e6b43baae128792d8827c12e527b935815d28f..ab511763c76c013f3c9f36260265fba371f4d291 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -7,6 +7,7 @@
 
 #include "base/callback.h"
 #include "base/md5.h"
+#include "build/build_config.h"
 #include "media/base/buffers.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
@@ -16,6 +17,14 @@ namespace media {
 class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
  public:
   enum {
+#if defined(ARCH_CPU_ARM_FAMILY)
+    kAlignmentSize = 16
+#else
+    kAlignmentSize = 32

[xhwang, 2012/12/02 02:13:13]

This is copied from DecoderBuffer. For VideoFrame, what exactly is the
requirement for alignment? How about just use 32 bytes alignment for all
VideoFrames?

+#endif
+  };
+
+  enum {
     kMaxPlanes = 3,
 
     kRGBPlane = 0,