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

chrome/browser/ui/views/infobars/infobar_view.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/infobars/infobar_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 71 matching lines @@
       child_container_(new views::View()),
       icon_(nullptr),
       close_button_(nullptr) {
   set_owned_by_client();  // InfoBar deletes itself at the appropriate time.
   set_background(
       new InfoBarBackground(infobars::InfoBar::delegate()->GetInfoBarType()));
   SetEventTargeter(make_scoped_ptr(new views::ViewTargeter(this)));
 
   AddChildView(child_container_);
 
+  SetPaintToLayer(true);
+  layer()->SetFillsBoundsOpaquely(false);
+
   if (ui::MaterialDesignController::IsModeMaterial()) {
-    SetPaintToLayer(true);
-    layer()->SetFillsBoundsOpaquely(false);
-
     child_container_->SetPaintToLayer(true);
     child_container_->layer()->SetMasksToBounds(true);
     // Since MD doesn't use a gradient, we can set a solid bg color.
     child_container_->set_background(
         views::Background::CreateSolidBackground(infobars::InfoBar::GetTopColor(
             infobars::InfoBar::delegate()->GetInfoBarType())));
   }
 }
 
 InfoBarView::~InfoBarView() {
@@ skipping 325 matching lines @@
 }
 
 bool InfoBarView::DoesIntersectRect(const View* target,
                                     const gfx::Rect& rect) const {
   DCHECK_EQ(this, target);
   // Only events that intersect the portion below the arrow are interesting.
   gfx::Rect non_arrow_bounds = GetLocalBounds();
   non_arrow_bounds.Inset(0, arrow_height(), 0, 0);
   return rect.Intersects(non_arrow_bounds);
 }