1 files changed, 24 insertions, 1 deletions
diff --git a/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h b/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
index be56941..8a1816d 100644
--- a/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
+++ b/chrome/browser/ui/cocoa/confirm_quit_panel_controller.h
@@ -12,6 +12,26 @@
 
 @class ConfirmQuitFrameView;
 
+namespace confirm_quit {
+
+enum ConfirmQuitMetric {
+  // The user quit without having the feature enabled.
+  kNoConfirm = 0,
+  // The user held Cmd+Q for the entire duration.
+  kHoldDuration,
+  // The user hit Cmd+Q twice for the accelerated path.
+  kDoubleTap,
+  // The user tapped Cmd+Q once and then held it.
+  kTapHold,
+
+  kSampleCount
+};
+
+// Records the histogram value for the above metric.
+void RecordHistogram(ConfirmQuitMetric sample);
+
+}  // namespace confirm_quit
+
 // The ConfirmQuitPanelController manages the black HUD window that tells users
 // to "Hold Cmd+Q to Quit".
 @interface ConfirmQuitPanelController : NSWindowController<NSWindowDelegate> {
@@ -42,10 +62,13 @@
 // Returns the Accelerator for the Quit menu item.
 + (ui::AcceleratorCocoa)quitAccelerator;
 
+// Returns a string representation fit for display of |+quitAccelerator|.
++ (NSString*)keyCommandString;
+
 @end
 
 @interface ConfirmQuitPanelController (UnitTesting)
-- (NSString*)keyCombinationForAccelerator:(const ui::AcceleratorCocoa&)item;
++ (NSString*)keyCombinationForAccelerator:(const ui::AcceleratorCocoa&)item;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_CONFIRM_QUIT_PANEL_CONTROLLER_H_