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

ios/chrome/browser/favicon/large_icon_cache.cc

 // Copyright 2015 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 "ios/chrome/browser/favicon/large_icon_cache.h"
 
 #include "components/favicon_base/fallback_icon_style.h"
 #include "components/favicon_base/favicon_types.h"
 #include "url/gurl.h"
 
 namespace {
 
 const int kMaxCacheSize = 12;
 
 }  // namespace
 
 struct LargeIconCacheEntry {
   LargeIconCacheEntry() {}
   ~LargeIconCacheEntry() {}
 
-  scoped_ptr<favicon_base::LargeIconResult> result;
+  std::unique_ptr<favicon_base::LargeIconResult> result;
 };
 
 LargeIconCache::LargeIconCache() : cache_(kMaxCacheSize) {}
 
 LargeIconCache::~LargeIconCache() {}
 
 void LargeIconCache::SetCachedResult(
     const GURL& url,
     const favicon_base::LargeIconResult& result) {
-  scoped_ptr<LargeIconCacheEntry> entry(new LargeIconCacheEntry);
+  std::unique_ptr<LargeIconCacheEntry> entry(new LargeIconCacheEntry);
   entry->result = CloneLargeIconResult(result);
   cache_.Put(url, std::move(entry));
 }
 
-scoped_ptr<favicon_base::LargeIconResult> LargeIconCache::GetCachedResult(
+std::unique_ptr<favicon_base::LargeIconResult> LargeIconCache::GetCachedResult(
     const GURL& url) {
   auto iter = cache_.Get(url);
   if (iter != cache_.end()) {
     DCHECK(iter->second->result);
     return CloneLargeIconResult(*iter->second->result.get());
   }
 
-  return scoped_ptr<favicon_base::LargeIconResult>();
+  return std::unique_ptr<favicon_base::LargeIconResult>();
 }
 
-scoped_ptr<favicon_base::LargeIconResult> LargeIconCache::CloneLargeIconResult(
+std::unique_ptr<favicon_base::LargeIconResult>
+LargeIconCache::CloneLargeIconResult(
     const favicon_base::LargeIconResult& large_icon_result) {
-  scoped_ptr<favicon_base::LargeIconResult> clone;
+  std::unique_ptr<favicon_base::LargeIconResult> clone;
   if (large_icon_result.bitmap.is_valid()) {
     clone.reset(new favicon_base::LargeIconResult(large_icon_result.bitmap));
   } else {
     clone.reset(
         new favicon_base::LargeIconResult(new favicon_base::FallbackIconStyle(
             *large_icon_result.fallback_icon_style.get())));
   }
   return clone;
 }