Browsing Data Deletion: Style fixes

chrome/browser/browsing_data/browsing_data_indexed_db_helper.h

Index: chrome/browser/browsing_data/browsing_data_indexed_db_helper.h
diff --git a/chrome/browser/browsing_data/browsing_data_indexed_db_helper.h b/chrome/browser/browsing_data/browsing_data_indexed_db_helper.h
index c98d7d710cb0038585ffb2d02fbe152e8de77ca8..f1880063ffabbbafe4a0bed0e1a335d305b6262e 100644
--- a/chrome/browser/browsing_data/browsing_data_indexed_db_helper.h
+++ b/chrome/browser/browsing_data/browsing_data_indexed_db_helper.h
@@ -33,7 +33,7 @@ class BrowsingDataIndexedDBHelper
   explicit BrowsingDataIndexedDBHelper(content::IndexedDBContext* context);
 
   // Starts the fetching process, which will notify its completion via
-  // |callback|. This must be called only in the UI thread.
+  // |callback|. This must be called only on the UI thread.
   virtual void StartFetching(
       const base::Callback<void(const std::list<content::IndexedDBInfo>&)>&
           callback);
@@ -60,7 +60,7 @@ class BrowsingDataIndexedDBHelper
   // Indicates whether or not we're currently fetching information:
   // it's true when StartFetching() is called in the UI thread, and it's reset
   // after we notified the callback in the UI thread.
-  // This only mutates on the UI thread.
+  // This member is only mutated on the UI thread.
   bool is_fetching_;
 
  private: