Animate showing / hiding the location bar for bookmark apps.

chrome/browser/ui/browser_window.h

Index: chrome/browser/ui/browser_window.h
diff --git a/chrome/browser/ui/browser_window.h b/chrome/browser/ui/browser_window.h
index ea17ad5fa919a767756b98561f2fdf50b9a318f5..6d78de4426226a02420aad644218b8bb6f077f26 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -178,6 +178,9 @@ class BrowserWindow : public ui::BaseWindow {
   // Focuses the toolbar (for accessibility).
   virtual void FocusToolbar() = 0;
 
+  // Called from toolbar subviews during their show/hide animations.
+  virtual void ToolbarSizeChanged(bool is_animating) = 0;
+
   // Focuses the app menu like it was a menu bar.
   //
   // Not used on the Mac, which has a "normal" menu bar.