[ash-md] Makes Wi-Fi header row sticky when network list is scrolled

ash/common/system/tray/hover_highlight_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 "ash/common/system/tray/hover_highlight_view.h"
 
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/view_click_listener.h"
 #include "ui/accessibility/ax_view_state.h"
@@ skipping 261 matching lines @@
 }
 
 void HoverHighlightView::OnEnabledChanged() {
   if (!enabled())
     SetHoverHighlight(false);
   for (int i = 0; i < child_count(); ++i)
     child_at(i)->SetEnabled(enabled());
 }
 
 void HoverHighlightView::OnPaintBackground(gfx::Canvas* canvas) {
-  canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
+  ActionableView::OnPaintBackground(canvas);

[varkha, 2016/10/26 22:14:25]

Note: scaffolding - the change will be removed in final patch. This simply makes
the fake header rows opaque.

+  //  canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
 }
 
 void HoverHighlightView::OnFocus() {
   ScrollRectToVisible(gfx::Rect(gfx::Point(), size()));
   ActionableView::OnFocus();
 }
 
 }  // namespace ash