Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/cocoa/omnibox/omnibox_popup_matrix_unittest.mm

 // Copyright (c) 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.
 
 #import "chrome/browser/ui/cocoa/omnibox/omnibox_popup_matrix.h"
 
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "ui/events/test/cocoa_test_event_utils.h"
 
 namespace {
@@ skipping 14 matching lines @@
         clicked_row_(0),
         middle_clicked_row_(0) {
   }
 
   virtual void SetUp() override {
     CocoaTest::SetUp();
     matrix_.reset([[OmniboxPopupMatrix alloc] initWithDelegate:this]);
     [[test_window() contentView] addSubview:matrix_];
   };
 
-  virtual void OnMatrixRowSelected(OmniboxPopupMatrix* matrix,
-                                   size_t row) override {
+  void OnMatrixRowSelected(OmniboxPopupMatrix* matrix, size_t row) override {
     selected_row_ = row;
     [matrix_ selectCellAtRow:row column:0];
   }
 
-  virtual void OnMatrixRowClicked(OmniboxPopupMatrix* matrix,
-                                size_t row) override {
+  void OnMatrixRowClicked(OmniboxPopupMatrix* matrix, size_t row) override {
     clicked_row_ = row;
   }
 
-  virtual void OnMatrixRowMiddleClicked(OmniboxPopupMatrix* matrix,
-                                        size_t row) override {
+  void OnMatrixRowMiddleClicked(OmniboxPopupMatrix* matrix,
+                                size_t row) override {
     middle_clicked_row_ = row;
   }
 
  protected:
   base::scoped_nsobject<OmniboxPopupMatrix> matrix_;
   size_t selected_row_;
   size_t clicked_row_;
   size_t middle_clicked_row_;
 
  private:
@@ skipping 20 matching lines @@
 
   [NSApp postEvent:MouseEventInRow(matrix_, NSLeftMouseUp, 2) atStart:YES];
   [matrix_ mouseDown:MouseEventInRow(matrix_, NSLeftMouseDown, 2)];
 
   EXPECT_EQ(2u, selected_row_);
   EXPECT_EQ(2u, clicked_row_);
   EXPECT_EQ(0u, middle_clicked_row_);
 }
 
 }  // namespace