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

chrome/browser/ui/infobar_container_delegate.cc

 // Copyright 2014 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/infobar_container_delegate.h"
 
 #include "build/build_config.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/animation/slide_animation.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "ui/views/window/non_client_view.h"
 #endif
 
 // static
 #if defined(OS_MACOSX)
 const int InfoBarContainerDelegate::kSeparatorLineHeight = 1;
 const int InfoBarContainerDelegate::kDefaultArrowTargetHeight = 11;
 #elif defined(TOOLKIT_VIEWS)
 // Views comes second until the Mac browser is Views-based.
 const int InfoBarContainerDelegate::kSeparatorLineHeight =
     views::NonClientFrameView::kClientEdgeThickness;
 const int InfoBarContainerDelegate::kDefaultArrowTargetHeight = 9;
 #endif
 
 const int InfoBarContainerDelegate::kDefaultBarTargetHeight = 36;
-const int InfoBarContainerDelegate::kDefaultBarTargetHeightMd = 40;
+const int InfoBarContainerDelegate::kDefaultBarTargetHeightMd = 39;
 const int InfoBarContainerDelegate::kMaximumArrowTargetHeight = 24;
 const int InfoBarContainerDelegate::kDefaultArrowTargetHalfWidth =
     kDefaultArrowTargetHeight;
 const int InfoBarContainerDelegate::kMaximumArrowTargetHalfWidth = 14;
 
 InfoBarContainerDelegate::InfoBarContainerDelegate()
     : top_arrow_target_height_(kDefaultArrowTargetHeight) {
 }
 
 InfoBarContainerDelegate::~InfoBarContainerDelegate() {
@@ skipping 60 matching lines @@
   if (*arrow_height)
     *arrow_height += kSeparatorLineHeight;
 
   int target_height = bar_target_height != -1
                           ? bar_target_height
                           : ui::MaterialDesignController::IsModeMaterial()
                                 ? kDefaultBarTargetHeightMd
                                 : kDefaultBarTargetHeight;
   *bar_height = animation.CurrentValueBetween(0, target_height);
 }