Animate showing / hiding the location bar for bookmark apps.

chrome/browser/ui/cocoa/browser_window_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
index 92fe33df1ca9105c5ea3a6cf37f74dfb7234bbed..15ff37f0e62964f3df10fcf46669b4012036fd82 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
@@ -476,6 +476,10 @@ void BrowserWindowCocoa::FocusToolbar() {
   // Not needed on the Mac.
 }
 
+void BrowserWindowCocoa::ToolbarSizeChanged(bool is_animating) {
+  // Not needed on the Mac.
+}
+
 void BrowserWindowCocoa::FocusAppMenu() {
   // Chrome uses the standard Mac OS X menu bar, so this isn't needed.
 }