[Mac] Prevent extension icon animation when window not visible.

chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm

Index: chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm
diff --git a/chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm b/chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm
index 3f97173ebd586de502c3e41e5576aec843711d5f..dcd0a8fca9005dc0970cbbe640f52212aae61dc2 100644
--- a/chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm
+++ b/chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm
@@ -658,9 +658,10 @@ void ToolbarActionsBarBridge::ShowExtensionMessageBubble(
   // Cocoa goes a little crazy if we try and change animations while adjusting
   // child frames (i.e., the buttons). If the toolbar is already animating,
   // just jump to the new frame. (This typically only happens if someone is
-  // "spamming" a button to add/remove an action.)
+  // "spamming" a button to add/remove an action.) If the window isn't visible
+  // (for example it's in the process of being created), don't bother animating.
   BOOL animate = !toolbarActionsBar_->suppress_animation() &&
-      ![containerView_ isAnimating];
+      ![containerView_ isAnimating] && [[containerView_ window] isVisible];
   [self updateContainerVisibility];
   [containerView_ resizeToWidth:width
                         animate:animate];