Native themes: Add separator color

ui/views/controls/separator.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 "ui/views/controls/separator.h"
 
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/gfx/canvas.h"
+#include "ui/native_theme/native_theme.h"
 
 namespace views {
 
 // static
 const char Separator::kViewClassName[] = "Separator";
 
 // The separator size in pixels.
 const int kSeparatorSize = 1;
 
-// Default color of the separator.
-const SkColor kDefaultColor = SkColorSetARGB(255, 233, 233, 233);
-
 Separator::Separator(Orientation orientation)
     : orientation_(orientation),
-      color_(kDefaultColor),
+      color_overridden_(false),
       size_(kSeparatorSize) {
+  SetColorFromNativeTheme();
 }
 
 Separator::~Separator() {
 }
 
 void Separator::SetColor(SkColor color) {
   color_ = color;
+  color_overridden_ = true;
   SchedulePaint();
 }
 
 void Separator::SetPreferredSize(int size) {
   if (size != size_) {
     size_ = size;
     PreferredSizeChanged();
   }
 }
 
+void Separator::SetColorFromNativeTheme() {
+  color_ = GetNativeTheme()->GetSystemColor(
+      ui::NativeTheme::kColorId_SeparatorColor);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Separator, View overrides:
 
 gfx::Size Separator::GetPreferredSize() const {
   gfx::Size size =
       orientation_ == HORIZONTAL ? gfx::Size(1, size_) : gfx::Size(size_, 1);
   gfx::Insets insets = GetInsets();
   size.Enlarge(insets.width(), insets.height());
   return size;
 }
 
 void Separator::GetAccessibleNodeData(ui::AXNodeData* node_data) {
   node_data->role = ui::AX_ROLE_SPLITTER;
 }
 
 void Separator::OnPaint(gfx::Canvas* canvas) {
   canvas->FillRect(GetContentsBounds(), color_);
 }
 
+void Separator::OnNativeThemeChanged(const ui::NativeTheme* theme) {
+  if (!color_overridden_)
+    SetColorFromNativeTheme();
+}
+
 const char* Separator::GetClassName() const {
   return kViewClassName;
 }
 
 }  // namespace views