Update appearance of omnibox focus for MD.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

 // Copyright 2012 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/location_bar/location_bar_view_mac.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #import "base/mac/mac_util.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 609 matching lines @@
     const int resource_id = omnibox_view_->GetIcon();
     NSImage* image = OmniboxViewMac::ImageForResource(resource_id);
     location_icon_decoration_->SetImage(image);
     ev_bubble_decoration_->SetImage(image);
     Layout();
     return;
   }
   UpdateLocationIcon();
 }
 
-void LocationBarViewMac::OnSetFocus() {
-  // Update the keyword and search hint states.
-  OnChanged();
-}
-
 void LocationBarViewMac::ShowURL() {
   omnibox_view_->ShowURL();
 }
 
 ToolbarModel* LocationBarViewMac::GetToolbarModel() {
   return browser_->toolbar_model();
 }
 
 const ToolbarModel* LocationBarViewMac::GetToolbarModel() const {
   return browser_->toolbar_model();
@@ skipping 162 matching lines @@
 
   return zoom_decoration_->UpdateIfNecessary(
       ui_zoom::ZoomController::FromWebContents(web_contents),
       default_zoom_changed, IsLocationBarDark());
 }
 
 void LocationBarViewMac::OnDefaultZoomLevelChanged() {
   if (UpdateZoomDecoration(/*default_zoom_changed=*/true))
     OnDecorationsChanged();
 }