Revert to zero-initializing buffers for FFmpegVideoDecoder

media/base/video_frame.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/video_frame.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 787 matching lines @@
                        StorageType storage_type,
                        const gfx::Size& coded_size,
                        const gfx::Rect& visible_rect,
                        const gfx::Size& natural_size,
                        base::TimeDelta timestamp)
     : format_(format),
       storage_type_(storage_type),
       coded_size_(coded_size),
       visible_rect_(visible_rect),
       natural_size_(natural_size),
+      allocated_size_(0),
       shared_memory_handle_(base::SharedMemory::NULLHandle()),
       shared_memory_offset_(0),
       timestamp_(timestamp),
       release_sync_point_(0) {
   DCHECK(IsValidConfig(format_, storage_type, coded_size_, visible_rect_,
                        natural_size_));
   memset(&mailbox_holders_, 0, sizeof(mailbox_holders_));
   memset(&strides_, 0, sizeof(strides_));
   memset(&data_, 0, sizeof(data_));
 }
@@ skipping 70 matching lines @@
 
   // The extra line of UV being allocated is because h264 chroma MC
   // overreads by one line in some cases, see libavcodec/utils.c:
   // avcodec_align_dimensions2() and libavcodec/x86/h264_chromamc.asm:
   // put_h264_chroma_mc4_ssse3().
   DCHECK(IsValidPlane(kUPlane, format_));
   data_size += strides_[kUPlane] + kFrameSizePadding;
 
   uint8* data = reinterpret_cast<uint8*>(
       base::AlignedAlloc(data_size, kFrameAddressAlignment));
-
   for (size_t plane = 0; plane < NumPlanes(format_); ++plane)
     data_[plane] = data + offset[plane];
 
   AddDestructionObserver(base::Bind(&base::AlignedFree, data));
+
+  // Make sure that allocated_size() returns the same size as allocated here.
+  allocated_size_ = data_size;
 }
 
 }  // namespace media