Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal/app_modal_dialog.cc

 // Copyright (c) 2011 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 "components/app_modal/app_modal_dialog.h"
 
 #include "base/logging.h"
 #include "base/run_loop.h"
 #include "components/app_modal/app_modal_dialog_queue.h"
 #include "components/app_modal/native_app_modal_dialog.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 
 using content::WebContents;
 
+namespace app_modal {
 namespace {
 
 AppModalDialogObserver* app_modal_dialog_observer = NULL;
 
 }  // namespace
 
 AppModalDialogObserver::AppModalDialogObserver() {
   DCHECK(!app_modal_dialog_observer);
   app_modal_dialog_observer = this;
 }
@@ skipping 49 matching lines @@
   DCHECK(native_dialog_);
   native_dialog_->CloseAppModalDialog();
 }
 
 void AppModalDialog::CompleteDialog() {
   if (!completed_) {
     completed_ = true;
     AppModalDialogQueue::GetInstance()->ShowNextDialog();
   }
 }
+
+}  // namespace app_modal