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

chrome/browser/extensions/api/bookmarks/bookmarks_api.h

Index: chrome/browser/extensions/api/bookmarks/bookmarks_api.h
diff --git a/chrome/browser/extensions/api/bookmarks/bookmarks_api.h b/chrome/browser/extensions/api/bookmarks/bookmarks_api.h
index ea12948dbf7be21020a8442003cba14a66efebc1..a04fc0b303f56b3a92d89242d0adc7a6f06904bf 100644
--- a/chrome/browser/extensions/api/bookmarks/bookmarks_api.h
+++ b/chrome/browser/extensions/api/bookmarks/bookmarks_api.h
@@ -84,7 +84,7 @@ class BookmarkEventRouter : public bookmarks::BookmarkModelObserver {
   // Helper to actually dispatch an event to extension listeners.
   void DispatchEvent(events::HistogramValue histogram_value,
                      const std::string& event_name,
-                     scoped_ptr<base::ListValue> event_args);
+                     std::unique_ptr<base::ListValue> event_args);
 
   content::BrowserContext* browser_context_;
   bookmarks::BookmarkModel* model_;
@@ -120,7 +120,7 @@ class BookmarksAPI : public BrowserContextKeyedAPI,
   static const bool kServiceIsNULLWhileTesting = true;
 
   // Created lazily upon OnListenerAdded.
-  scoped_ptr<BookmarkEventRouter> bookmark_event_router_;
+  std::unique_ptr<BookmarkEventRouter> bookmark_event_router_;
 };
 
 class BookmarksFunction : public ChromeAsyncExtensionFunction,