Factor iOS native image loading into a utility function.

ios/chrome/browser/ui/omnibox/omnibox_popup_material_row.mm

 // Copyright (c) 2014 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/omnibox/omnibox_popup_material_row.h"
 
 #include "base/logging.h"
 #include "base/mac/objc_property_releaser.h"
 #import "ios/chrome/browser/ui/omnibox/truncating_attributed_label.h"
 #include "ios/chrome/browser/ui/rtl_geometry.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"
-#include "ui/base/resource/resource_bundle.h"
 
 namespace {
 const CGFloat kImageDimensionLength = 19.0;
 const CGFloat kLeadingPaddingIpad = 164;
 const CGFloat kLeadingPaddingIpadCompact = 71;
 const CGFloat kAppendButtonTrailingMargin = 4;
 }
 
 @interface OmniboxPopupMaterialRow () {
   BOOL _incognito;
   base::mac::ObjCPropertyReleaser _propertyReleaser_OmniboxPopupMaterialRow;
 }
 
 // Set the append button normal and highlighted images.
 - (void)updateAppendButtonImages;
 
-// Set the Physical Web image view image.
-- (void)updatePhysicalWebImage;
-
 @end
 
 @implementation OmniboxPopupMaterialRow
 
 @synthesize textTruncatingLabel = _textTruncatingLabel;
 @synthesize detailTruncatingLabel = _detailTruncatingLabel;
 @synthesize appendButton = _appendButton;
 @synthesize answerImageView = _answerImageView;
 @synthesize imageView = _imageView;
 @synthesize physicalWebImageView = _physicalWebImageView;
@@ skipping 29 matching lines @@
     _appendButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain];
     [_appendButton setContentMode:UIViewContentModeRight];
     [self updateAppendButtonImages];
     // TODO(justincohen): Consider using the UITableViewCell's accessory view.
     // The current implementation is from before using a UITableViewCell.
     [self addSubview:_appendButton];
 
     _physicalWebImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
     _physicalWebImageView.userInteractionEnabled = NO;
     _physicalWebImageView.contentMode = UIViewContentModeCenter;
-    [self updatePhysicalWebImage];
+    _physicalWebImageView.image = NativeImage(IDR_IOS_OMNIBOX_PHYSICAL_WEB);
     [self addSubview:_physicalWebImageView];
 
     // Left icon is only displayed on iPad.
     if (IsIPadIdiom()) {
       _imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
       _imageView.userInteractionEnabled = NO;
       _imageView.contentMode = UIViewContentModeCenter;
 
       // TODO(justincohen): Consider using the UITableViewCell's image view.
       // The current implementation is from before using a UITableViewCell.
@@ skipping 26 matching lines @@
   LayoutRect rightAccessoryLayout =
       LayoutRectMake(CGRectGetWidth(self.bounds) - appendButtonDimensionLength -
                          kAppendButtonTrailingMargin,
                      CGRectGetWidth(self.bounds),
                      floor((_rowHeight - appendButtonDimensionLength) / 2),
                      appendButtonDimensionLength, appendButtonDimensionLength);
   _appendButton.frame = LayoutRectGetRect(rightAccessoryLayout);
   _physicalWebImageView.frame = LayoutRectGetRect(rightAccessoryLayout);
 }
 
-- (void)updateLeftImage:(int)imageId {
-  // Update the image.
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  UIImage* image = rb.GetNativeImageNamed(imageId).ToUIImage();
-  _imageView.image = image;
+- (void)updateLeftImage:(int)imageID {
+  _imageView.image = NativeImage(imageID);
 
   // Adjust the vertical position based on the current size of the row.
   CGRect frame = _imageView.frame;
   frame.origin.y = floor((_rowHeight - kImageDimensionLength) / 2);
   _imageView.frame = frame;
 }
 
 - (void)updateHighlightBackground:(BOOL)highlighted {
   // Set the background color to match the color of selected table view cells
   // when their selection style is UITableViewCellSelectionStyleGray.
   if (highlighted) {
     self.backgroundColor = _incognito ? [UIColor colorWithWhite:1 alpha:0.1]
                                       : [UIColor colorWithWhite:0 alpha:0.05];
   } else {
     self.backgroundColor = [UIColor clearColor];
   }
 }
 
 - (void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated {
   [super setHighlighted:highlighted animated:animated];
   [self updateHighlightBackground:highlighted];
 }
 
 - (void)setHighlighted:(BOOL)highlighted {
   [super setHighlighted:highlighted];
   [self updateHighlightBackground:highlighted];
 }
 
 - (void)updateAppendButtonImages {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   int appendResourceID = _incognito
                              ? IDR_IOS_OMNIBOX_KEYBOARD_VIEW_APPEND_INCOGNITO
                              : IDR_IOS_OMNIBOX_KEYBOARD_VIEW_APPEND;
-  UIImage* appendImage = rb.GetNativeImageNamed(appendResourceID).ToUIImage();
-  if (UseRTLLayout()) {
-    appendImage = [appendImage imageFlippedForRightToLeftLayoutDirection];
-  }
+  UIImage* appendImage = NativeReversableImage(appendResourceID, YES);
 
   [_appendButton setImage:appendImage forState:UIControlStateNormal];
   int appendSelectedResourceID =
       _incognito ? IDR_IOS_OMNIBOX_KEYBOARD_VIEW_APPEND_INCOGNITO_HIGHLIGHTED
                  : IDR_IOS_OMNIBOX_KEYBOARD_VIEW_APPEND_HIGHLIGHTED;
-  UIImage* appendImageSelected =
-      rb.GetNativeImageNamed(appendSelectedResourceID).ToUIImage();
+  UIImage* appendImageSelected = NativeImage(appendSelectedResourceID);
   [_appendButton setImage:appendImageSelected
                  forState:UIControlStateHighlighted];
 }
 
-- (void)updatePhysicalWebImage {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  UIImage* physicalWebImage =
-      rb.GetNativeImageNamed(IDR_IOS_OMNIBOX_PHYSICAL_WEB).ToUIImage();
-  _physicalWebImageView.image = physicalWebImage;
-}
-
 - (NSString*)accessibilityLabel {
   return _textTruncatingLabel.attributedText.string;
 }
 
 - (NSString*)accessibilityValue {
   return _detailTruncatingLabel.attributedText.string;
 }
 
 @end