[Extension Toolbar] Slide out overflowed actions for popups

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

Index: chrome/browser/ui/cocoa/extensions/browser_actions_container_view.mm
diff --git a/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.mm b/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.mm
index d718eec153dc75ff690b75632600604f5e46e7bf..20bda3815550ae6fe70045b7e8524ca3bba4bec2 100644
--- a/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.mm
+++ b/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.mm
@@ -21,6 +21,8 @@ NSString* const kBrowserActionsContainerWillAnimate =
     @"BrowserActionsContainerWillAnimate";
 NSString* const kBrowserActionsContainerMouseEntered =
     @"BrowserActionsContainerMouseEntered";
+NSString* const kBrowserActionsContainerAnimationEnded =
+    @"BrowserActionsContainerAnimationEnded";
 NSString* const kTranslationWithDelta =
     @"TranslationWithDelta";
 
@@ -61,6 +63,7 @@ const CGFloat kMinimumContainerWidth = 3.0;
     resizeAnimation_.reset([[NSViewAnimation alloc] init]);
     [resizeAnimation_ setDuration:kAnimationDuration];
     [resizeAnimation_ setAnimationBlockingMode:NSAnimationNonblocking];
+    [resizeAnimation_ setDelegate:self];
 
     [self setHidden:YES];
   }
@@ -199,6 +202,28 @@ const CGFloat kMinimumContainerWidth = 3.0;
                     object:self];
 }
 
+- (void)animationDidEnd:(NSAnimation*)animation {
+  // We notify asynchronously so that the animation fully finishes before any
+  // listeners do work.
+  [self performSelector:@selector(notifyAnimationEnded)
+              withObject:self
+              afterDelay:0];
+}
+
+- (void)animationDidStop:(NSAnimation*)animation {
+  // We notify asynchronously so that the animation fully finishes before any
+  // listeners do work.
+  [self performSelector:@selector(notifyAnimationEnded)
+              withObject:self
+              afterDelay:0];
+}
+
+- (void)notifyAnimationEnded {
+  [[NSNotificationCenter defaultCenter]
+      postNotificationName:kBrowserActionsContainerAnimationEnded
+                    object:self];
+}
+
 - (ViewID)viewID {
   return VIEW_ID_BROWSER_ACTION_TOOLBAR;
 }