[MD] Implement incognito colors as a NativeTheme (for Aura).

ui/native_theme/common_theme.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/native_theme/common_theme.h"
 
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/base/resource/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 47 matching lines @@
 
 bool CommonThemeGetSystemColor(NativeTheme::ColorId color_id, SkColor* color) {
   // MD colors.
   if (ui::MaterialDesignController::IsModeMaterial()) {
     // MenuItem:
     const SkColor kMenuHighlightBackgroundColorMd =
         SkColorSetARGB(0x14, 0x00, 0x00, 0x00);
     const SkColor kSelectedMenuItemForegroundColorMd = SK_ColorBLACK;
     // Link:
     const SkColor kLinkDisabledColorMd = SK_ColorBLACK;
-    const SkColor kLinkEnabledColorMd = SkColorSetRGB(0x33, 0x67, 0xD6);
+    const SkColor kLinkEnabledColorMd = gfx::kGoogleBlue700;
 
     switch (color_id) {
       // MenuItem
       case NativeTheme::kColorId_FocusedMenuItemBackgroundColor:
         *color = kMenuHighlightBackgroundColorMd;
         return true;
       case NativeTheme::kColorId_SelectedMenuItemForegroundColor:
         *color = kSelectedMenuItemForegroundColorMd;
         return true;
       // Link
@@ skipping 185 matching lines @@
 // static
 scoped_ptr<gfx::Canvas> CommonThemeCreateCanvas(SkCanvas* sk_canvas) {
   // TODO(pkotwicz): Do something better and don't infer device
   // scale factor from canvas scale.
   SkMatrix m = sk_canvas->getTotalMatrix();
   float device_scale = static_cast<float>(SkScalarAbs(m.getScaleX()));
   return make_scoped_ptr(new gfx::Canvas(sk_canvas, device_scale));
 }
 
 }  // namespace ui