Add GetImageSkiaNamed to resource_bundle and theme_provider

chrome/browser/ui/cocoa/download/background_theme.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.
 
 #include "chrome/browser/ui/cocoa/download/background_theme.h"
 
 #import "chrome/browser/themes/theme_service.h"
 
 BackgroundTheme::BackgroundTheme(ui::ThemeProvider* provider) :
     provider_(provider) {
@@ skipping 10 matching lines @@
       [[NSColor colorWithCalibratedWhite:0 alpha:36/255.0] retain]);
   buttonGradient_.reset([[NSGradient alloc]
       initWithColors:[NSArray arrayWithObject:bgColor]]);
   buttonPressedGradient_.reset([[NSGradient alloc]
       initWithColors:[NSArray arrayWithObject:clickedColor]]);
 }
 
 BackgroundTheme::~BackgroundTheme() {}
 
 SkBitmap* BackgroundTheme::GetBitmapNamed(int id) const {
-  return nil;
+  return NULL;
+}
+
+gfx::ImageSkia* BackgroundTheme::GetImageSkiaNamed(int id) const {
+  return NULL;
 }
 
 SkColor BackgroundTheme::GetColor(int id) const {
   return SkColor();
 }
 
 bool BackgroundTheme::GetDisplayProperty(int id, int* result) const {
   return false;
 }
 
@@ skipping 36 matching lines @@
       return buttonGradient_.get();
     case ThemeService::GRADIENT_TOOLBAR_BUTTON_PRESSED:
     case ThemeService::GRADIENT_TOOLBAR_BUTTON_PRESSED_INACTIVE:
       return buttonPressedGradient_.get();
     default:
       return provider_->GetNSGradient(id);
   }
 }