[MD] replace infobar bottom solid line separator with a shadow.

chrome/browser/ui/views/frame/browser_view.cc

 // Copyright 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/frame/browser_view.h"
 
 #include <stdint.h>
 #include <algorithm>
 #include <utility>
 
@@ skipping 2625 matching lines @@
 
 int BrowserView::GetMaxTopInfoBarArrowHeight() {
   int top_arrow_height = 0;
   // Only show the arrows when not in fullscreen and when there's no omnibox
   // popup.
   if (!IsFullscreen() &&
       !GetLocationBar()->GetOmniboxView()->model()->popup_model()->IsOpen()) {
     gfx::Point icon_bottom(
         toolbar_->location_bar()->GetLocationBarAnchorPoint());
     ConvertPointToTarget(toolbar_->location_bar(), this, &icon_bottom);
-    gfx::Point infobar_top(0, infobar_container_->GetVerticalOverlap(nullptr));
+    gfx::Point infobar_top;
     ConvertPointToTarget(infobar_container_, this, &infobar_top);
     top_arrow_height = infobar_top.y() - icon_bottom.y();
   }
   return top_arrow_height;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserView, ExclusiveAccessContext implementation:
 Profile* BrowserView::GetProfile() {
   return browser_->profile();
@@ skipping 54 matching lines @@
 }
 
 extensions::ActiveTabPermissionGranter*
 BrowserView::GetActiveTabPermissionGranter() {
   content::WebContents* web_contents = GetActiveWebContents();
   if (!web_contents)
     return nullptr;
   return extensions::TabHelper::FromWebContents(web_contents)
       ->active_tab_permission_granter();
 }