[Mac] Confirm-to-Quit: Wait for a KeyUp event if the user held Cmd+Q on the second tap.

chrome/browser/ui/cocoa/confirm_quit_panel_controller.h

Index: chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
diff --git a/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h b/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
index 649f17cda61db764ba3237ddcccd8776778d8681..be569410f6fff6bee098e1ac9c0f38676c526734 100644
--- a/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
+++ b/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
@@ -24,6 +24,14 @@
 // does not currently exist.
 + (ConfirmQuitPanelController*)sharedController;
 
+// Checks whether the |event| should trigger the feature.
++ (BOOL)eventTriggersFeature:(NSEvent*)event;
+
+// Runs a modal loop that brings up the panel and handles the logic for if and
+// when to terminate. Returns NSApplicationTerminateReply for use in
+// -[NSApplicationDelegate applicationShouldTerminate:].
+- (NSApplicationTerminateReply)runModalLoopForApplication:(NSApplication*)app;
+
 // Shows the window.
 - (void)showWindow:(id)sender;