New method I420Buffer::Copy.

webrtc/common_video/i420_video_frame_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 236 matching lines @@
   EXPECT_EQ(100u, frame.timestamp());
   EXPECT_EQ(10, frame.render_time_ms());
   EXPECT_EQ(handle, frame.native_handle());
 
   frame.set_timestamp(200);
   EXPECT_EQ(200u, frame.timestamp());
   frame.set_render_time_ms(20);
   EXPECT_EQ(20, frame.render_time_ms());
 }
 
+TEST(TestI420FrameBuffer, Copy) {
+  rtc::scoped_refptr<I420Buffer> buf1(
+      new rtc::RefCountedObject<I420Buffer>(20, 10));
+  memset(buf1->MutableData(kYPlane), 1, 200);
+  memset(buf1->MutableData(kUPlane), 2, 50);
+  memset(buf1->MutableData(kVPlane), 3, 50);
+  rtc::scoped_refptr<I420Buffer> buf2 = I420Buffer::Copy(buf1);
+  EXPECT_TRUE(test::FrameBufsEqual(buf1, buf2));
+}
+
 }  // namespace webrtc