Add a blocking version of the sync promo dialog

chrome/browser/ui/webui/html_dialog_ui.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/string16.h"
+#include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/ui_base_types.h"
 
 struct ContextMenuParams;
 
 namespace base {
 class ListValue;
 template<class T> class PropertyAccessor;
 }
@@ skipping 48 matching lines @@
   // A callback to allow the delegate to dictate that the window should not
   // have a title bar.  This is useful when presenting branded interfaces.
   virtual bool ShouldShowDialogTitle() const = 0;
 
   // A callback to allow the delegate to inhibit context menu or show
   // customized menu.
   // Returns true iff you do NOT want the standard context menu to be
   // shown (because you want to handle it yourself).
   virtual bool HandleContextMenu(const ContextMenuParams& params);
 
+  // A callback to allow the delegate to open a new URL inside |source|.
+  // On return |out_new_contents| should contain the WebContents the URL
+  // is opened in. Return false to use the default handler.
+  virtual bool HandleOpenURLFromTab(content::WebContents* source,
+                                    const content::OpenURLParams& params,
+                                    content::WebContents** out_new_contents);
+
+  // A callback to create a new tab with |new_contents|. Return false to use the
+  // default handler.
+  virtual bool HandleAddNewContents(content::WebContents* source,
+                                    content::WebContents* new_contents,
+                                    WindowOpenDisposition disposition,
+                                    const gfx::Rect& initial_pos,
+                                    bool user_gesture);
+
   // Stores the dialog bounds.
   virtual void StoreDialogSize(const gfx::Size& dialog_size) {}
 
  protected:
   virtual ~HtmlDialogUIDelegate() {}
 };
 
 // Displays file URL contents inside a modal HTML dialog.
 //
 // This application really should not use WebContents + WebUI. It should instead
@@ skipping 43 matching lines @@
 // Intended to be the place to collect the settings and lockdowns
 // necessary for running external UI components securely (e.g., the
 // cloud print dialog).
 class ExternalHtmlDialogUI : public HtmlDialogUI {
  public:
   explicit ExternalHtmlDialogUI(content::WebUI* web_ui);
   virtual ~ExternalHtmlDialogUI();
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_