Revert to zero-initializing buffers for FFmpegVideoDecoder

media/base/video_frame_pool_unittest.cc

 // Copyright 2013 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_pool.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace media {
 
 class VideoFramePoolTest : public ::testing::Test {
@@ skipping 21 matching lines @@
   }
 
   void CheckPoolSize(size_t size) const {
     EXPECT_EQ(size, pool_->GetPoolSizeForTesting());
   }
 
  protected:
   scoped_ptr<VideoFramePool> pool_;
 };
 
+TEST_F(VideoFramePoolTest, FrameInitializedAndZeroed) {
+  scoped_refptr<VideoFrame> frame = CreateFrame(PIXEL_FORMAT_YV12, 10);
+
+  // Verify that frame is initialized with zeros.
+  for (size_t i = 0; i < VideoFrame::NumPlanes(frame->format()); ++i)
+    EXPECT_EQ(0, frame->data(i)[0]);
+}
+
 TEST_F(VideoFramePoolTest, SimpleFrameReuse) {
   scoped_refptr<VideoFrame> frame = CreateFrame(PIXEL_FORMAT_YV12, 10);
   const uint8* old_y_data = frame->data(VideoFrame::kYPlane);
 
   // Clear frame reference to return the frame to the pool.
   frame = NULL;
 
   // Verify that the next frame from the pool uses the same memory.
   scoped_refptr<VideoFrame> new_frame = CreateFrame(PIXEL_FORMAT_YV12, 20);
   EXPECT_EQ(old_y_data, new_frame->data(VideoFrame::kYPlane));
@@ skipping 22 matching lines @@
   // Destroy the pool.
   pool_.reset();
 
   // Write to the Y plane. The memory tools should detect a
   // use-after-free if the storage was actually removed by pool destruction.
   memset(frame->data(VideoFrame::kYPlane), 0xff,
          frame->rows(VideoFrame::kYPlane) * frame->stride(VideoFrame::kYPlane));
 }
 
 }  // namespace media