Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc

Index: chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc
diff --git a/chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc b/chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc
index 24d5d16adbbad926beb2037f522d19a357693901..e2dd721e7ada64593240403c734d6a0fd4a68ec0 100644
--- a/chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc
+++ b/chrome/browser/ui/webui/md_downloads/downloads_list_tracker.cc
@@ -70,7 +70,7 @@ const char* GetDangerTypeString(content::DownloadDangerType danger_type) {
 
 // TODO(dbeam): if useful elsewhere, move to base/i18n/time_formatting.h?
 base::string16 TimeFormatLongDate(const base::Time& time) {
-  scoped_ptr<icu::DateFormat> formatter(
+  std::unique_ptr<icu::DateFormat> formatter(
       icu::DateFormat::createDateInstance(icu::DateFormat::kLong));
   icu::UnicodeString date_string;
   formatter->format(static_cast<UDate>(time.ToDoubleT() * 1000), date_string);
@@ -185,7 +185,8 @@ DownloadsListTracker::DownloadsListTracker(
   Init();
 }
 
-scoped_ptr<base::DictionaryValue> DownloadsListTracker::CreateDownloadItemValue(
+std::unique_ptr<base::DictionaryValue>
+DownloadsListTracker::CreateDownloadItemValue(
     content::DownloadItem* download_item) const {
   // TODO(asanka): Move towards using download_model here for getting status and
   // progress. The difference currently only matters to Drive downloads and
@@ -196,7 +197,7 @@ scoped_ptr<base::DictionaryValue> DownloadsListTracker::CreateDownloadItemValue(
   // chrome/browser/resources/downloads/downloads.js in @typedef for
   // BackendDownloadObject. Please update it whenever you add or remove
   // any keys in file_value.
-  scoped_ptr<base::DictionaryValue> file_value(new base::DictionaryValue);
+  std::unique_ptr<base::DictionaryValue> file_value(new base::DictionaryValue);
 
   file_value->SetInteger(
       "started", static_cast<int>(download_item->GetStartTime().ToTimeT()));