MacViews: Unify web contents modal dialog types

chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm

Index: chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
diff --git a/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm b/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
index d51550820545bff07717681c4fcc3e18065c3304..2b5c140753ce3554a05912d99ffa6b6426b0575c 100644
--- a/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
+++ b/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
@@ -72,9 +72,7 @@ class ConstrainedWebDialogDelegateViewMac :
   void ReleaseWebContentsOnDialogClose() override {
     return impl_->ReleaseWebContentsOnDialogClose();
   }
-  NativeWebContentsModalDialog GetNativeDialog() override {
-    return constrained_window_->GetNativeDialog();
-  }
+  NativeWebContentsModalDialog GetNativeDialog() override { return window_; }
   WebContents* GetWebContents() override { return impl_->GetWebContents(); }
   gfx::Size GetMinimumSize() const override {
     NOTIMPLEMENTED();