Factor iOS native image loading into a utility function.

ios/chrome/browser/ui/side_swipe/card_side_swipe_view.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/side_swipe/card_side_swipe_view.h"
 
 #include <cmath>
 
 #include "base/ios/device_util.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/tabs/tab.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
 #import "ios/chrome/browser/ui/background_generator.h"
 #import "ios/chrome/browser/ui/ntp/new_tab_page_panel_protocol.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
 #import "ios/chrome/browser/ui/side_swipe/side_swipe_util.h"
 #import "ios/chrome/browser/ui/side_swipe_gesture_recognizer.h"
 #import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 #import "ios/web/web_state/ui/crw_web_controller.h"
-#include "ui/base/resource/resource_bundle.h"
 #include "url/gurl.h"
 
 using base::UserMetricsAction;
 
 namespace {
 // Spacing between cards.
 const CGFloat kCardHorizontalSpacing = 30;
 
 // Portion of the screen an edge card can be dragged.
 const CGFloat kEdgeCardDragPercentage = 0.35;
@@ skipping 12 matching lines @@
   if (self) {
     image_.reset([[UIImageView alloc] initWithFrame:CGRectZero]);
     [image_ setClipsToBounds:YES];
     [image_ setContentMode:UIViewContentModeScaleAspectFill];
     [self addSubview:image_];
 
     toolbarHolder_.reset([[UIImageView alloc] initWithFrame:CGRectZero]);
     [self addSubview:toolbarHolder_];
 
     shadowView_.reset([[UIImageView alloc] initWithFrame:self.bounds]);
-    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-    gfx::Image shadow = rb.GetNativeImageNamed(IDR_IOS_TOOLBAR_SHADOW);
-    [shadowView_ setImage:shadow.ToUIImage()];
+    [shadowView_ setImage:NativeImage(IDR_IOS_TOOLBAR_SHADOW)];
     [self addSubview:shadowView_];
 
     // All subviews are as wide as the parent
     NSMutableArray* constraints = [NSMutableArray array];
     for (UIView* view in self.subviews) {
       [view setTranslatesAutoresizingMaskIntoConstraints:NO];
       [constraints addObject:[view.leadingAnchor
                                  constraintEqualToAnchor:self.leadingAnchor]];
       [constraints addObject:[view.trailingAnchor
                                  constraintEqualToAnchor:self.trailingAnchor]];
@@ skipping 320 matching lines @@
       completion:^(BOOL finished) {
         [leftCard_ setImage:nil];
         [rightCard_ setImage:nil];
         [leftCard_ setToolbarImage:nil isNewTabPage:NO];
         [rightCard_ setToolbarImage:nil isNewTabPage:NO];
         [delegate_ sideSwipeViewDismissAnimationDidEnd:self];
       }];
 }
 
 @end