[MD] Don't allow overflowing location icons to appear on top of toolbar

chrome/browser/ui/views/dropdown_bar_host.cc

 // 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.
 
 #include "chrome/browser/ui/views/dropdown_bar_host.h"
 
 #include <algorithm>
 
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/browser/ui/views/dropdown_bar_host_delegate.h"
@@ skipping 24 matching lines @@
 void DropdownBarHost::Init(views::View* host_view,
                            views::View* view,
                            DropdownBarHostDelegate* delegate) {
   DCHECK(view);
   DCHECK(delegate);
 
   view_ = view;
   delegate_ = delegate;
 
   // The |clip_view| exists to paint to a layer so that it can clip descendent
-  // Views which also paint to a Layer.
+  // Views which also paint to a Layer. See http://crbug.com/589497
   scoped_ptr<views::View> clip_view(new views::View());
   clip_view->SetPaintToLayer(true);
   clip_view->SetFillsBoundsOpaquely(false);
   clip_view->layer()->SetMasksToBounds(true);
   clip_view->AddChildView(view_);
 
   // Initialize the host.
   host_.reset(new ThemeCopyingWidget(browser_view_->GetWidget()));
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
@@ skipping 173 matching lines @@
       escape, ui::AcceleratorManager::kNormalPriority, this);
   esc_accel_target_registered_ = true;
 }
 
 void DropdownBarHost::UnregisterAccelerators() {
   DCHECK(esc_accel_target_registered_);
   ui::Accelerator escape(ui::VKEY_ESCAPE, ui::EF_NONE);
   focus_manager_->UnregisterAccelerator(escape, this);
   esc_accel_target_registered_ = false;
 }