Convert //cc from scoped_ptr to std::unique_ptr.

cc/debug/picture_debug_util.cc

Index: cc/debug/picture_debug_util.cc
diff --git a/cc/debug/picture_debug_util.cc b/cc/debug/picture_debug_util.cc
index dda4dce74a5524942ca6d3b1c482c0a66ec102b0..aef9ba8ae08fad35187690114ff9d4e5820b6086 100644
--- a/cc/debug/picture_debug_util.cc
+++ b/cc/debug/picture_debug_util.cc
@@ -7,11 +7,11 @@
 #include <stddef.h>
 
 #include <limits>
+#include <memory>
 #include <vector>
 
 #include "base/base64.h"
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkImageInfo.h"
@@ -71,7 +71,7 @@ void PictureDebugUtil::SerializeAsBase64(const SkPicture* picture,
   picture->serialize(&stream, &serializer);
 
   size_t serialized_size = stream.bytesWritten();
-  scoped_ptr<char[]> serialized_picture(new char[serialized_size]);
+  std::unique_ptr<char[]> serialized_picture(new char[serialized_size]);
   stream.copyTo(serialized_picture.get());
   base::Base64Encode(
       base::StringPiece(serialized_picture.get(), serialized_size), output);