[Extensions UI Mac] Fix race condition in showing the icon surfacing bubble

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

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #import "chrome/browser/ui/cocoa/view_id_util.h"
@@ skipping 104 matching lines @@
                                        owner:self
                                     userInfo:nil]);
     [self addTrackingArea:trackingArea_.get()];
   } else if (trackingArea_.get()) {
     [self removeTrackingArea:trackingArea_.get()];
     [trackingArea_.get() clearOwner];
     trackingArea_.reset(nil);
   }
 }
 
+- (BOOL)trackingEnabled {
+  return trackingArea_.get() != nullptr;
+}
+
 - (void)keyDown:(NSEvent*)theEvent {
   // If this is the overflow container, we handle three key events: left, right,
   // and space. Left and right navigate the actions within the container, and
   // space activates the current one. We have to handle this ourselves, because
   // Cocoa doesn't treat custom views with subviews in menu items differently
   // than any other menu item, so it would otherwise be impossible to navigate
   // to a particular action from the keyboard.
   ui::KeyboardCode key = ui::KeyboardCodeFromNSEvent(theEvent);
   BOOL shouldProcess = isOverflow_ &&
       (key == ui::VKEY_RIGHT || key == ui::VKEY_LEFT || key == ui::VKEY_SPACE);
@@ skipping 33 matching lines @@
 
 - (void)setHighlight:(scoped_ptr<ui::NinePartImageIds>)highlight {
   if (highlight || highlight_) {
     highlight_ = std::move(highlight);
     // We don't allow resizing when the container is highlighting.
     resizable_ = highlight.get() == nullptr;
     [self setNeedsDisplay:YES];
   }
 }
 
+- (BOOL)isHighlighting {
+  return highlight_.get() != nullptr;
+}
+
 - (void)setIsOverflow:(BOOL)isOverflow {
   if (isOverflow_ != isOverflow) {
     isOverflow_ = isOverflow;
     resizable_ = !isOverflow_;
     [self setNeedsDisplay:YES];
   }
 }
 
 - (void)resetCursorRects {
   [self addCursorRect:grippyRect_ cursor:[self appropriateCursorForGrippy]];
@@ skipping 175 matching lines @@
     retVal = [NSCursor resizeLeftRightCursor];
   }
   return retVal;
 }
 
 - (CGFloat)maxAllowedWidth {
   return delegate_ ? delegate_->GetMaxAllowedWidth() : CGFLOAT_MAX;
 }
 
 @end