Add sign in dialog for GCP->print preview integration.

chrome/browser/ui/webui/cloud_print_signin_dialog.h

Index: chrome/browser/ui/webui/cloud_print_signin_dialog.h
diff --git a/chrome/browser/ui/webui/cloud_print_signin_dialog.h b/chrome/browser/ui/webui/cloud_print_signin_dialog.h
new file mode 100644
index 0000000000000000000000000000000000000000..4fb06ec9c832063b3ea1a1adc562414878e60497
--- /dev/null
+++ b/chrome/browser/ui/webui/cloud_print_signin_dialog.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_CLOUD_PRINT_SIGNIN_DIALOG_H_
+#define CHROME_BROWSER_UI_WEBUI_CLOUD_PRINT_SIGNIN_DIALOG_H_
+#pragma once
+
+class TabContents;
+
+namespace cloud_print_signin_dialog {
+// Creates a dialog for signing into cloud print.
+// The dialog will close and refresh |parent_tab| when complete.
+// Called on the UI thread. Even though this starts up a modal
+// dialog, it will return immediately. The dialog is handled asynchronously.
+void CreateCloudPrintSigninDialog(TabContents* parent_tab);
+}
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CLOUD_PRINT_SIGNIN_DIALOG_H_
+