Use a uniform opaque type to represent web contents modal dialogs

chrome/browser/ui/native_web_contents_modal_dialog_manager.h

Index: chrome/browser/ui/native_web_contents_modal_dialog_manager.h
diff --git a/chrome/browser/ui/native_web_contents_modal_dialog_manager.h b/chrome/browser/ui/native_web_contents_modal_dialog_manager.h
index 7630b8c9ee010b5417c099c0ff30752d4d2d7e67..c40596ff2c0fa1609ee25551a2b1802442cb6bc6 100644
--- a/chrome/browser/ui/native_web_contents_modal_dialog_manager.h
+++ b/chrome/browser/ui/native_web_contents_modal_dialog_manager.h
@@ -5,22 +5,24 @@
 #ifndef CHROME_BROWSER_UI_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_H_
 #define CHROME_BROWSER_UI_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_H_
 
-#include "ui/gfx/native_widget_types.h"
+#include "chrome/browser/ui/native_web_contents_modal_dialog.h"
 
 // Provides an interface for platform-specific UI implementation for the web
 // contents modal dialog.
 class NativeWebContentsModalDialogManager {
  public:
-  NativeWebContentsModalDialogManager() {}
   virtual ~NativeWebContentsModalDialogManager() {}
 
   // Starts management of the modal aspects of the dialog.  This function should
   // also register to be notified when the dialog is closing, so that it can
   // notify the manager.
-  virtual void ManageDialog(gfx::NativeWindow window) = 0;
+  virtual void ManageDialog(NativeWebContentsModalDialog dialog) = 0;
 
   // Closes the web contents modal dialog.
-  virtual void CloseDialog(gfx::NativeWindow window) = 0;
+  virtual void CloseDialog(NativeWebContentsModalDialog dialog) = 0;
+
+ protected:
+  NativeWebContentsModalDialogManager() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NativeWebContentsModalDialogManager);