Revert changes to have ExtensionService notify ThemeService directly

chrome/browser/extensions/extension_install_ui_default.cc

 // 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/extensions/extension_install_ui_default.h"
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
@@ skipping 82 matching lines @@
 
 ExtensionInstallUIDefault::ExtensionInstallUIDefault(Profile* profile)
     : skip_post_install_ui_(false),
       previous_using_native_theme_(false),
       use_app_installed_bubble_(false) {
   profile_ = profile;
 
   // |profile_| can be NULL during tests.
   if (profile_) {
     // Remember the current theme in case the user presses undo.
-    previous_theme_id_ = ThemeService::GetThemeIDForProfile(profile);
+    const Extension* previous_theme =
+        ThemeServiceFactory::GetThemeForProfile(profile);
+    if (previous_theme)
+      previous_theme_id_ = previous_theme->id();
     previous_using_native_theme_ =
         ThemeServiceFactory::GetForProfile(profile)->UsingNativeTheme();
   }
 }
 
 ExtensionInstallUIDefault::~ExtensionInstallUIDefault() {
 }
 
 void ExtensionInstallUIDefault::OnInstallSuccess(const Extension* extension,
                                                  SkBitmap* icon) {
@@ skipping 168 matching lines @@
   return new ExtensionInstallPrompt(web_contents);
 }
 
 // static
 ExtensionInstallPrompt* ExtensionInstallUI::CreateInstallPromptWithProfile(
     Profile* profile) {
   Browser* browser = chrome::FindLastActiveWithProfile(profile,
       chrome::GetActiveDesktop());
   return CreateInstallPromptWithBrowser(browser);
 }