Replace scoped_ptr with std::unique_ptr in //media.

media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc

Index: media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc
diff --git a/media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc b/media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc
index 8535b14da63a53fb1a92b754618b0ae33ac94e8a..ade64566620fd683423531136dd9f64852455a92 100644
--- a/media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc
+++ b/media/cdm/ppapi/external_clear_key/cdm_video_decoder.cc
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/memory/scoped_ptr.h"
 #include "media/cdm/ppapi/external_clear_key/cdm_video_decoder.h"
 
 #if defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
@@ -19,9 +18,10 @@
 
 namespace media {
 
-scoped_ptr<CdmVideoDecoder> CreateVideoDecoder(
-    ClearKeyCdmHost* host, const cdm::VideoDecoderConfig& config) {
-  scoped_ptr<CdmVideoDecoder> video_decoder;
+std::unique_ptr<CdmVideoDecoder> CreateVideoDecoder(
+    ClearKeyCdmHost* host,
+    const cdm::VideoDecoderConfig& config) {
+  std::unique_ptr<CdmVideoDecoder> video_decoder;
 #if defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
   video_decoder.reset(new FakeCdmVideoDecoder(host));