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

ui/native_theme/native_theme_aura_dark.cc

+// Copyright 2015 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/native_theme_aura_dark.h"
+
+#include "ui/base/resource/material_design/material_design_controller.h"
+
+namespace ui {
+
+NativeThemeAuraDark* NativeThemeAuraDark::instance() {
+  CR_DEFINE_STATIC_LOCAL(NativeThemeAuraDark, s_native_theme, ());
+  return &s_native_theme;
+}
+
+NativeThemeAuraDark::NativeThemeAuraDark() {}
+
+NativeThemeAuraDark::~NativeThemeAuraDark() {}
+
+SkColor NativeThemeAuraDark::GetSystemColor(ColorId color_id) const {
+  if (!ui::MaterialDesignController::IsModeMaterial())
+    return NativeThemeAura::GetSystemColor(color_id);
+
+  static const SkColor kLinkEnabledColor = SkColorSetRGB(0x7B, 0xAA, 0xF7);
+
+  static const SkColor kTextfieldDefaultColor = SK_ColorWHITE;
+  static const SkColor kTextfieldDefaultBackground =
+      SkColorSetRGB(0x62, 0x62, 0x62);
+
+  static const SkColor kResultsTableNormalBackground =
+      SkColorSetRGB(0x28, 0x28, 0x28);
+  static const SkColor kResultsTableText = SK_ColorWHITE;
+  static const SkColor kResultsTableDimmedText =
+      SkColorSetA(kResultsTableText, 0x80);
+
+  switch (color_id) {
+    // Link
+    case kColorId_LinkEnabled:
+      return kLinkEnabledColor;
+
+    // Textfield
+    case kColorId_TextfieldDefaultColor:
+      return kTextfieldDefaultColor;
+    case kColorId_TextfieldDefaultBackground:
+      return kTextfieldDefaultBackground;
+
+    // Results Tables
+    case kColorId_ResultsTableNormalBackground:
+      return kResultsTableNormalBackground;
+    case kColorId_ResultsTableNormalText:
+    case kColorId_ResultsTableHoveredText:
+    case kColorId_ResultsTableSelectedText:
+    case kColorId_ResultsTableNormalHeadline:
+    case kColorId_ResultsTableHoveredHeadline:
+    case kColorId_ResultsTableSelectedHeadline:
+      return kResultsTableText;
+    case kColorId_ResultsTableNormalDimmedText:
+    case kColorId_ResultsTableHoveredDimmedText:
+    case kColorId_ResultsTableSelectedDimmedText:
+      return kResultsTableDimmedText;
+
+    default:
+      break;
+  }
+
+  return NativeThemeAura::GetSystemColor(color_id);
+}
+
+}  // namespace ui