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

chrome/browser/ui/webui/extensions/extension_icon_source.h

Index: chrome/browser/ui/webui/extensions/extension_icon_source.h
diff --git a/chrome/browser/ui/webui/extensions/extension_icon_source.h b/chrome/browser/ui/webui/extensions/extension_icon_source.h
index 4e838f90f8ae9e6e0b03596657ef372571065f3c..16e8bf96fe370495d66ccb80c449bfe80bf970e4 100644
--- a/chrome/browser/ui/webui/extensions/extension_icon_source.h
+++ b/chrome/browser/ui/webui/extensions/extension_icon_source.h
@@ -152,9 +152,9 @@ class ExtensionIconSource : public content::URLDataSource,
   // Maps request_ids to ExtensionIconRequests.
   std::map<int, ExtensionIconRequest*> request_map_;
 
-  scoped_ptr<SkBitmap> default_app_data_;
+  std::unique_ptr<SkBitmap> default_app_data_;
 
-  scoped_ptr<SkBitmap> default_extension_data_;
+  std::unique_ptr<SkBitmap> default_extension_data_;
 
   base::CancelableTaskTracker cancelable_task_tracker_;