Standardize usage of virtual/override/final specifiers in content/.

content/browser/dom_storage/dom_storage_task_runner.h

Index: content/browser/dom_storage/dom_storage_task_runner.h
diff --git a/content/browser/dom_storage/dom_storage_task_runner.h b/content/browser/dom_storage/dom_storage_task_runner.h
index a2000a08c1435d909bc78956d8358d1ce8b2aa54..c6bd13e692b106c08f5df68495cb57a712506e9b 100644
--- a/content/browser/dom_storage/dom_storage_task_runner.h
+++ b/content/browser/dom_storage/dom_storage_task_runner.h
@@ -36,10 +36,9 @@ class CONTENT_EXPORT DOMStorageTaskRunner
 
   // The PostTask() and PostDelayedTask() methods defined by TaskRunner
   // post shutdown-blocking tasks on the primary sequence.
-  virtual bool PostDelayedTask(
-      const tracked_objects::Location& from_here,
-      const base::Closure& task,
-      base::TimeDelta delay) = 0;
+  bool PostDelayedTask(const tracked_objects::Location& from_here,
+                       const base::Closure& task,
+                       base::TimeDelta delay) override = 0;
 
   // Posts a shutdown blocking task to |sequence_id|.
   virtual bool PostShutdownBlockingTask(