Revert to zero-initializing buffers for FFmpegVideoDecoder

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 80169cbe822990ca487fa5993d12bc2c5a7aa0d0..de6ee073d7883fbebbe1a2f1bc74893fe625d267 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -297,6 +297,10 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
 
   int stride(size_t plane) const;
 
+  // Returns the actual allocation size for a YUV frame that is created by
+  // CreateFrame() method.
+  size_t allocated_size() const { return allocated_size_; }
+
   // Returns the number of bytes per row and number of rows for a given plane.
   //
   // As opposed to stride(), row_bytes() refers to the bytes representing
@@ -444,6 +448,9 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
   // strides can be negative.
   int32 strides_[kMaxPlanes];
 
+  // Actual allocation size for a YUV frame with alignments and padding.
+  size_t allocated_size_;

[miu, 2015/08/04 20:16:22]

This isn't needed.  See comments below.

+
   // Array of data pointers to each plane.
   // TODO(mcasas): we don't know on ctor if we own |data_| or not. After
   // refactoring VideoFrame, change to scoped_ptr<uint8, AlignedFreeDeleter>.