[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..4bde52dca66c516adceabffd396c8bfc2d6407e9 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";
 
@@ -30,6 +32,49 @@ const CGFloat kGrippyWidth = 3.0;
 const CGFloat kMinimumContainerWidth = 3.0;
 }  // namespace
 
+@interface ContainerAnimationHelper : NSObject<NSAnimationDelegate> {
+  BrowserActionsContainerView* container_;
+}
+
+- (id)initWithContainer:(BrowserActionsContainerView*)container;
+
+- (void)animationDidEnd:(NSAnimation*)animation;
+- (void)animationDidStop:(NSAnimation*)animation;
+
+- (void)notifyAnimationEnded;
+
+@end
+
+@implementation ContainerAnimationHelper
+
+- (id)initWithContainer:(BrowserActionsContainerView*)container {
+  if ((self = [super init])) {
+    container_ = container;
+  }
+  return self;
+}
+
+- (void)animationDidEnd:(NSAnimation*)animation {
+  [self performSelector:@selector(notifyAnimationEnded)
+              withObject:self
+              afterDelay:0];
+}
+
+- (void)animationDidStop:(NSAnimation*)animation {
+  [self performSelector:@selector(notifyAnimationEnded)
+              withObject:self
+              afterDelay:0];
+}
+
+- (void)notifyAnimationEnded {
+  [[NSNotificationCenter defaultCenter]
+      postNotificationName:kBrowserActionsContainerAnimationEnded
+                    object:container_];
+}
+
+@end
+
+
 @interface BrowserActionsContainerView(Private)
 // Returns the cursor that should be shown when hovering over the grippy based
 // on |canDragLeft_| and |canDragRight_|.
@@ -58,9 +103,12 @@ const CGFloat kMinimumContainerWidth = 3.0;
     canDragRight_ = YES;
     resizable_ = YES;
 
+    animationHelper_.reset(
+        [[ContainerAnimationHelper alloc] initWithContainer:self]);
     resizeAnimation_.reset([[NSViewAnimation alloc] init]);
     [resizeAnimation_ setDuration:kAnimationDuration];
     [resizeAnimation_ setAnimationBlockingMode:NSAnimationNonblocking];
+    [resizeAnimation_ setDelegate:animationHelper_.get()];
 
     [self setHidden:YES];
   }