[Mac] The infobar's top arrow should be hidden while the omnibox popup is shown

chrome/browser/ui/cocoa/infobars/infobar_container_controller.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/infobars/infobar_container_controller.h"
 
 #include "base/logging.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_cocoa.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_cocoa.h"
@@ skipping 124 matching lines @@
   // dealloc'ed too early.
   [[controller retain] autorelease];
   [[controller view] removeFromSuperview];
   [infobarControllers_ removeObject:controller];
 }
 
 - (void)setMaxTopArrowHeight:(NSInteger)height {
   containerCocoa_->SetMaxTopArrowHeight(height, containerCocoa_.get());
 }
 
+- (NSInteger)defaultMaxTopArrowHeight {
+  return containerCocoa_->DefaultMaxTopArrowHeight();
+}
+
 - (CGFloat)heightOfInfoBars {
   CGFloat totalHeight = 0;
   for (InfoBarController* controller in infobarControllers_.get()) {
     totalHeight += [controller infobar]->total_height() -
                    [controller infobar]->arrow_height();
   }
   return totalHeight;
 }
 
 @end