Revert 212329 "Reland "Close web contents modal dialogs on conte..."

trunk/src/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.mm

Index: trunk/src/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.mm
===================================================================
--- trunk/src/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.mm	(revision 214772)
+++ trunk/src/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.mm	(working copy)
@@ -88,7 +88,7 @@
       [[CustomConstrainedWindowSheet alloc]
           initWithCustomWindow:[alert_ window]]);
   window_.reset(new ConstrainedWindowMac(this, web_contents, sheet));
-  delegate_->set_operations_delegate(this);
+  delegate_->set_close_delegate(this);
 }
 
 TabModalConfirmDialogMac::~TabModalConfirmDialogMac() {
@@ -106,10 +106,6 @@
   window_->CloseWebContentsModalDialog();
 }
 
-void TabModalConfirmDialogMac::SetPreventCloseOnLoadStart(bool prevent) {
-  window_->SetPreventCloseOnLoadStart(prevent);
-}
-
 void TabModalConfirmDialogMac::OnConstrainedWindowClosed(
     ConstrainedWindowMac* window) {
   delete this;