Factor iOS native image loading into a utility function.

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

 // Copyright (c) 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/omnibox/omnibox_text_field_ios.h"
 
 #import <CoreText/CoreText.h>
 
 #include "base/command_line.h"
 #include "base/ios/ios_util.h"
@@ skipping 10 matching lines @@
 #import "ios/chrome/browser/ui/reversed_animation.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"
 #import "ios/chrome/common/material_timing.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 #include "skia/ext/skia_utils_ios.h"
 #include "third_party/google_toolbox_for_mac/src/iPhone/GTMFadeTruncatingLabel.h"
 #include "ui/base/l10n/l10n_util_mac.h"
-#include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/image/image.h"
 #import "ui/gfx/ios/NSString+CrStringDrawing.h"
 #include "ui/gfx/scoped_cg_context_save_gstate_mac.h"
 
 namespace {
 const CGFloat kFontSize = 16;
 const CGFloat kEditingRectX = 16;
 const CGFloat kEditingRectWidthInset = 10;
 const CGFloat kTextInset = 8;
@@ skipping 359 matching lines @@
   // Only set the chip image if the omnibox is in focus.
   if ([self isShowingQueryRefinementChip]) {
     [leftViewButton setTitle:_chipText forState:UIControlStateNormal];
     [leftViewButton setImage:nil forState:UIControlStateNormal];
     [leftViewButton
         setTitleEdgeInsets:UIEdgeInsetsMake(kChipTextTopInset,
                                             kChipTextLeftInset, 0, 0)];
     // For iPhone, the left view is only updated when not in editing mode (i.e.
     // the text field is not first responder).
   } else if (_leftViewImageId && (IsIPadIdiom() || ![self isFirstResponder])) {
-    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-    gfx::Image defaultImage = rb.GetNativeImageNamed(_leftViewImageId);
-    UIImage* image = [defaultImage.ToUIImage()
+    UIImage* image = [NativeImage(_leftViewImageId)
         imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
     UIImageView* imageView =
         [[[UIImageView alloc] initWithImage:image] autorelease];
     [leftViewButton setImage:imageView.image forState:UIControlStateNormal];
     [leftViewButton setTitle:nil forState:UIControlStateNormal];
     UIColor* tint = [UIColor whiteColor];
     if (!_incognito) {
       switch (_leftViewImageId) {
         case IDR_IOS_LOCATION_BAR_HTTP:
           tint = [UIColor darkGrayColor];
@@ skipping 620 matching lines @@
   // Disable the RTL arrow menu item. The omnibox sets alignment based on the
   // text in the field, and should not be overridden.
   if ([NSStringFromSelector(action) hasPrefix:@"makeTextWritingDirection"]) {
     return NO;
   }
 
   return [super canPerformAction:action withSender:sender];
 }
 
 @end