Set AllowOverlappingViews for history overlay

content/browser/web_contents/web_contents_view_mac.mm

 // Copyright (c) 2012 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 <Carbon/Carbon.h>
 
 #import "content/browser/web_contents/web_contents_view_mac.h"
 
 #include <string>
 
@@ skipping 255 matching lines @@
   if (allow_overlapping_views_ == overlapping)
     return;
 
   allow_overlapping_views_ = overlapping;
   RenderWidgetHostViewMac* view = static_cast<RenderWidgetHostViewMac*>(
       web_contents_->GetRenderWidgetHostView());
   if (view)
     view->SetAllowOverlappingViews(allow_overlapping_views_);
 }
 
+bool WebContentsViewMac::GetAllowOverlappingViews() const {
+  return allow_overlapping_views_;
+}
+
 void WebContentsViewMac::CreateView(
     const gfx::Size& initial_size, gfx::NativeView context) {
   WebContentsViewCocoa* view =
       [[WebContentsViewCocoa alloc] initWithWebContentsViewMac:this];
   cocoa_view_.reset(view);
 }
 
 RenderWidgetHostView* WebContentsViewMac::CreateViewForWidget(
     RenderWidgetHost* render_widget_host) {
   if (render_widget_host->GetView()) {
@@ skipping 277 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self webContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end