Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

chrome/browser/ui/views/chrome_javascript_native_dialog_factory_views.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/app_modal_dialogs/chrome_javascript_native_dialog_factory.h"
 
 #include "components/app_modal_dialogs/javascript_dialog_manager.h"
 #include "components/app_modal_dialogs/javascript_native_dialog_factory.h"
 #include "components/constrained_window/constrained_window_views.h"
 
@@ skipping 24 matching lines @@
     CreateBrowserModalDialogViews(d, parent_window);
     return d;
   }
 
   DISALLOW_COPY_AND_ASSIGN(ChromeJavaScriptNativeDialogViewsFactory);
 };
 
 }  // namespace
 
 void InstallChromeJavaScriptNativeDialogFactory() {
-  SetJavaScriptNativeDialogFactory(
+  JavaScriptDialogManager::GetInstance()->SetNativeDialogFactory(
       make_scoped_ptr(new ChromeJavaScriptNativeDialogViewsFactory));
 }