Standardize usage of virtual/override/final specifiers.

chrome/browser/search/iframe_source_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/search/iframe_source.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 108 matching lines @@
 
   void SendJSWithOrigin(
       int resource_id,
       int render_process_id,
       int render_frame_id) {
     source()->SendJSWithOrigin(resource_id, render_process_id, render_frame_id,
                                callback_);
   }
 
  private:
-  virtual void SetUp() override {
+  void SetUp() override {
     source_.reset(new TestIframeSource());
     callback_ = base::Bind(&IframeSourceTest::SaveResponse,
                            base::Unretained(this));
     instant_io_context_ = new InstantIOContext;
     InstantIOContext::SetUserDataOnIO(&resource_context_, instant_io_context_);
     InstantIOContext::AddInstantProcessOnIO(instant_io_context_,
                                             kInstantRendererPID);
     response_ = NULL;
   }
 
-  virtual void TearDown() {
-    source_.reset();
-  }
+  void TearDown() override { source_.reset(); }
 
   void SaveResponse(base::RefCountedMemory* data) {
     response_ = data;
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
 
   net::TestURLRequestContext test_url_request_context_;
   content::MockResourceContext resource_context_;
   scoped_ptr<TestIframeSource> source_;
@@ skipping 39 matching lines @@
 }
 
 TEST_F(IframeSourceTest, SendJSWithOrigin) {
   SendJSWithOrigin(IDR_MOST_VISITED_TITLE_JS, kInstantRendererPID, 0);
   EXPECT_FALSE(response_string().empty());
   SendJSWithOrigin(IDR_MOST_VISITED_TITLE_JS, kNonInstantRendererPID, 0);
   EXPECT_FALSE(response_string().empty());
   SendJSWithOrigin(IDR_MOST_VISITED_TITLE_JS, kInvalidRendererPID, 0);
   EXPECT_TRUE(response_string().empty());
 }