Created VideoFramePool to avoid unnecessary VideoFrame alloc/free.

media/base/video_frame.cc

Index: media/base/video_frame.cc
diff --git a/media/base/video_frame.cc b/media/base/video_frame.cc
index fd7fd19f408b7a1f46e3cf7b0172aa87d9295e72..2593bf33496d4558a3e3f1ed2196b1eb6409c242 100644
--- a/media/base/video_frame.cc
+++ b/media/base/video_frame.cc
@@ -181,6 +181,23 @@ scoped_refptr<VideoFrame> VideoFrame::WrapExternalYuvData(
 }
 
 // static
+scoped_refptr<VideoFrame> VideoFrame::WrapVideoFrame(
+      const scoped_refptr<VideoFrame>& frame,
+      const base::Closure& no_longer_needed_cb) {
+  scoped_refptr<VideoFrame> wrapped_frame(new VideoFrame(
+      frame->format(), frame->coded_size(), frame->visible_rect(),
+      frame->natural_size(), frame->GetTimestamp(), frame->end_of_stream()));
+
+  for (size_t i = 0; i < NumPlanes(frame->format()); ++i) {
+    wrapped_frame->strides_[i] = frame->stride(i);
+    wrapped_frame->data_[i] = frame->data(i);
+  }
+
+  wrapped_frame->no_longer_needed_cb_ = no_longer_needed_cb;
+  return wrapped_frame;
+}
+
+// static
 scoped_refptr<VideoFrame> VideoFrame::CreateEOSFrame() {
   return new VideoFrame(VideoFrame::UNKNOWN,
                         gfx::Size(),