Add a top shadow to material design omnibox dropdown

chrome/browser/ui/views/location_bar/location_bar_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/location_bar/location_bar_view.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/i18n/rtl.h"
@@ skipping 470 matching lines @@
 int LocationBarView::GetInternalHeight(bool use_preferred_size) {
   int total_height =
       use_preferred_size ? GetPreferredSize().height() : height();
   return std::max(total_height - (VerticalPadding() * 2), 0);
 }
 
 void LocationBarView::GetOmniboxPopupPositioningInfo(
     gfx::Point* top_left_screen_coord,
     int* popup_width,
     int* left_margin,
-    int* right_margin) {
-  // Because the popup might appear atop the attached bookmark bar, there won't
-  // necessarily be a client edge separating it from the rest of the toolbar.
-  // Therefore we position the popup high enough so it can draw its own client
-  // edge at the top, in the same place the toolbar would normally draw the
-  // client edge.
-  *top_left_screen_coord = gfx::Point(
-      0,
-      parent()->height() - views::NonClientFrameView::kClientEdgeThickness);
+    int* right_margin,
+    int top_edge_overlap) {
+  *top_left_screen_coord = gfx::Point(0, parent()->height() - top_edge_overlap);
   views::View::ConvertPointToScreen(parent(), top_left_screen_coord);
+
   *popup_width = parent()->width();
-
   gfx::Rect location_bar_bounds(bounds());
   location_bar_bounds.Inset(kNormalEdgeThickness, 0);
   *left_margin = location_bar_bounds.x();
   *right_margin = *popup_width - location_bar_bounds.right();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // LocationBarView, public LocationBar implementation:
 
 void LocationBarView::FocusLocation(bool select_all) {
@@ skipping 896 matching lines @@
 
 void LocationBarView::ModelChanged(const SearchModel::State& old_state,
                                    const SearchModel::State& new_state) {
   const bool visible = !GetToolbarModel()->input_in_progress() &&
       new_state.voice_search_supported;
   if (mic_search_view_->visible() != visible) {
     mic_search_view_->SetVisible(visible);
     Layout();
   }
 }