Factor iOS native image loading into a utility function.

ios/chrome/browser/ui/toolbar/web_toolbar_controller.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 "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 
 #import <CoreLocation/CoreLocation.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include <stdint.h>
@@ skipping 49 matching lines @@
 #import "ios/public/provider/chrome/browser/images/branded_image_provider.h"
 #import "ios/public/provider/chrome/browser/voice/voice_search_provider.h"
 #import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
 #import "ios/third_party/material_components_ios/src/components/ProgressView/src/MaterialProgressView.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #include "ios/web/public/referrer.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "net/base/mac/url_conversions.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/page_transition_types.h"
-#include "ui/base/resource/resource_bundle.h"
 #import "ui/gfx/ios/NSString+CrStringDrawing.h"
 
 using base::UserMetricsAction;
 using ios::material::TimingFunction;
 
 NSString* const kTabHistoryPopupWillShowNotification =
     @"kTabHistoryPopupWillShowNotification";
 NSString* const kTabHistoryPopupWillHideNotification =
     @"kTabHistoryPopupWillHideNotification";
 const CGFloat kiPhoneOmniboxPlaceholderColorBrightness = 150 / 255.0;
@@ skipping 2483 matching lines @@
 
 - (BOOL)isPrerenderAnimationRunning {
   return _prerenderAnimating;
 }
 
 - (OmniboxTextFieldIOS*)omnibox {
   return _omniBox.get();
 }
 
 @end