Convert //ppapi to use std::unique_ptr

ppapi/shared_impl/compositor_layer_data.cc

 // Copyright 2014 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 "ppapi/shared_impl/compositor_layer_data.h"
 
 namespace ppapi {
 
 namespace {
 
-template<typename T>
-void Copy(scoped_ptr<T>* a, const scoped_ptr<T>& b) {
+template <typename T>
+void Copy(std::unique_ptr<T>* a, const std::unique_ptr<T>& b) {
   if (b) {
     if (!(*a))
       a->reset(new T());
     **a = *b;
   } else {
     a->reset();
   }
 }
 
 }  // namespace
 
 const CompositorLayerData& CompositorLayerData::operator=(
     const CompositorLayerData& other) {
   DCHECK(other.is_null() || other.is_valid());
 
   common = other.common;
   Copy(&color, other.color);
   Copy(&texture, other.texture);
   Copy(&image, other.image);
 
   return *this;
 }
 
 }  // namespace ppapi