Use the default theme as the fallback UI in Blink

ui/native_theme/fallback_theme.cc

Index: ui/native_theme/fallback_theme.cc
diff --git a/ui/native_theme/fallback_theme.cc b/ui/native_theme/fallback_theme.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4bfe8d9804c268387d1c4bdf508e8d53212b4dc0
--- /dev/null
+++ b/ui/native_theme/fallback_theme.cc
@@ -0,0 +1,198 @@
+// 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/fallback_theme.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "ui/gfx/color_utils.h"
+#include "ui/gfx/skia_utils_gtk.h"
+#include "ui/native_theme/common_theme.h"
+
+namespace ui {
+
+FallbackTheme::FallbackTheme() {
+}
+
+FallbackTheme::~FallbackTheme() {
+}
+
+SkColor FallbackTheme::GetSystemColor(ColorId color_id) const {
+  // This implementation returns hardcoded colors.
+
+  static const SkColor kInvalidColorIdColor = SkColorSetRGB(255, 0, 128);
+  // Menu:
+  static const SkColor kMenuBackgroundColor = SK_ColorWHITE;
+  // Windows:
+  static const SkColor kWindowBackgroundColor = SK_ColorWHITE;
+  // Dialogs:
+  static const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
+  // FocusableBorder:
+  static const SkColor kFocusedBorderColor = SkColorSetRGB(0x4D, 0x90, 0xFE);
+  static const SkColor kUnfocusedBorderColor = SkColorSetRGB(0xD9, 0xD9, 0xD9);
+  // Button:
+  static const SkColor kButtonBackgroundColor = SkColorSetRGB(0xDE, 0xDE, 0xDE);
+  static const SkColor kButtonEnabledColor = SkColorSetRGB(0x22, 0x22, 0x22);
+  static const SkColor kButtonDisabledColor = SkColorSetRGB(0x99, 0x99, 0x99);
+  static const SkColor kButtonHighlightColor = SkColorSetRGB(0, 0, 0);
+  static const SkColor kButtonHoverColor = kButtonEnabledColor;
+  // MenuItem:
+  static const SkColor kEnabledMenuItemForegroundColor = kButtonEnabledColor;
+  static const SkColor kDisabledMenuItemForegroundColor = kButtonDisabledColor;
+  static const SkColor kFocusedMenuItemBackgroundColor =
+      SkColorSetRGB(0xF1, 0xF1, 0xF1);
+  static const SkColor kHoverMenuItemBackgroundColor =
+      SkColorSetARGB(204, 255, 255, 255);
+  static const SkColor kMenuSeparatorColor = SkColorSetRGB(0xED, 0xED, 0xED);
+  static const SkColor kEnabledMenuButtonBorderColor =
+      SkColorSetARGB(36, 0, 0, 0);
+  static const SkColor kFocusedMenuButtonBorderColor =
+      SkColorSetARGB(72, 0, 0, 0);
+  static const SkColor kHoverMenuButtonBorderColor =
+      SkColorSetARGB(72, 0, 0, 0);
+  // Label:
+  static const SkColor kLabelEnabledColor = kButtonEnabledColor;
+  static const SkColor kLabelDisabledColor = kButtonDisabledColor;
+  static const SkColor kLabelBackgroundColor = SK_ColorWHITE;
+  // Textfield:
+  static const SkColor kTextfieldDefaultColor = SK_ColorBLACK;
+  static const SkColor kTextfieldDefaultBackground = SK_ColorWHITE;
+  static const SkColor kTextfieldReadOnlyColor = SK_ColorDKGRAY;
+  static const SkColor kTextfieldReadOnlyBackground = SK_ColorWHITE;
+  static const SkColor kTextfieldSelectionBackgroundFocused =
+      SkColorSetARGB(0x54, 0x60, 0xA8, 0xEB);
+  static const SkColor kTextfieldSelectionBackgroundUnfocused = SK_ColorLTGRAY;
+  static const SkColor kTextfieldSelectionColor =
+      color_utils::AlphaBlend(SK_ColorBLACK,
+          kTextfieldSelectionBackgroundFocused, 0xdd);
+  // Tree
+  static const SkColor kTreeBackground = SK_ColorWHITE;
+  static const SkColor kTreeTextColor = SK_ColorBLACK;
+  static const SkColor kTreeSelectedTextColor = SK_ColorBLACK;
+  static const SkColor kTreeSelectionBackgroundColor =
+      SkColorSetRGB(0xEE, 0xEE, 0xEE);
+  static const SkColor kTreeArrowColor = SkColorSetRGB(0x7A, 0x7A, 0x7A);
+  // Table
+  static const SkColor kTableBackground = SK_ColorWHITE;
+  static const SkColor kTableTextColor = SK_ColorBLACK;
+  static const SkColor kTableSelectedTextColor = SK_ColorBLACK;
+  static const SkColor kTableSelectionBackgroundColor =
+      SkColorSetRGB(0xEE, 0xEE, 0xEE);
+  static const SkColor kTableGroupingIndicatorColor =
+      SkColorSetRGB(0xCC, 0xCC, 0xCC);
+
+  SkColor color;
+  if (CommonThemeGetSystemColor(color_id, &color))
+    return color;
+
+  switch (color_id) {
+    // Windows
+    case kColorId_WindowBackground:
+      return kWindowBackgroundColor;
+
+    // Dialogs
+    case kColorId_DialogBackground:
+      return kDialogBackgroundColor;
+
+    // FocusableBorder
+    case kColorId_FocusedBorderColor:
+      return kFocusedBorderColor;
+    case kColorId_UnfocusedBorderColor:
+      return kUnfocusedBorderColor;
+
+    // Button
+    case kColorId_ButtonBackgroundColor:
+      return kButtonBackgroundColor;
+    case kColorId_ButtonEnabledColor:
+      return kButtonEnabledColor;
+    case kColorId_ButtonDisabledColor:
+      return kButtonDisabledColor;
+    case kColorId_ButtonHighlightColor:
+      return kButtonHighlightColor;
+    case kColorId_ButtonHoverColor:
+      return kButtonHoverColor;
+
+    // MenuItem
+    case kColorId_EnabledMenuItemForegroundColor:
+      return kEnabledMenuItemForegroundColor;
+    case kColorId_DisabledMenuItemForegroundColor:
+      return kDisabledMenuItemForegroundColor;
+    case kColorId_SelectedMenuItemForegroundColor:
+      return kEnabledMenuItemForegroundColor;
+    case kColorId_FocusedMenuItemBackgroundColor:
+      return kFocusedMenuItemBackgroundColor;
+    case kColorId_HoverMenuItemBackgroundColor:
+      return kHoverMenuItemBackgroundColor;
+    case kColorId_MenuSeparatorColor:
+      return kMenuSeparatorColor;
+    case kColorId_EnabledMenuButtonBorderColor:
+      return kEnabledMenuButtonBorderColor;
+    case kColorId_FocusedMenuButtonBorderColor:
+      return kFocusedMenuButtonBorderColor;
+    case kColorId_HoverMenuButtonBorderColor:
+      return kHoverMenuButtonBorderColor;
+
+    // Label
+    case kColorId_LabelEnabledColor:
+      return kLabelEnabledColor;
+    case kColorId_LabelDisabledColor:
+      return kLabelDisabledColor;
+    case kColorId_LabelBackgroundColor:
+      return kLabelBackgroundColor;
+
+    // Textfield
+    case kColorId_TextfieldDefaultColor:
+      return kTextfieldDefaultColor;
+    case kColorId_TextfieldDefaultBackground:
+      return kTextfieldDefaultBackground;
+    case kColorId_TextfieldReadOnlyColor:
+      return kTextfieldReadOnlyColor;
+    case kColorId_TextfieldReadOnlyBackground:
+      return kTextfieldReadOnlyBackground;
+    case kColorId_TextfieldSelectionColor:
+      return kTextfieldSelectionColor;
+    case kColorId_TextfieldSelectionBackgroundFocused:
+      return kTextfieldSelectionBackgroundFocused;
+    case kColorId_TextfieldSelectionBackgroundUnfocused:
+      return kTextfieldSelectionBackgroundUnfocused;
+
+    // Tree
+    case kColorId_TreeBackground:
+      return kTreeBackground;
+    case kColorId_TreeText:
+      return kTreeTextColor;
+    case kColorId_TreeSelectedText:
+    case kColorId_TreeSelectedTextUnfocused:
+      return kTreeSelectedTextColor;
+    case kColorId_TreeSelectionBackgroundFocused:
+    case kColorId_TreeSelectionBackgroundUnfocused:
+      return kTreeSelectionBackgroundColor;
+    case kColorId_TreeArrow:
+      return kTreeArrowColor;
+
+    // Table
+    case kColorId_TableBackground:
+      return kTableBackground;
+    case kColorId_TableText:
+      return kTableTextColor;
+    case kColorId_TableSelectedText:
+    case kColorId_TableSelectedTextUnfocused:
+      return kTableSelectedTextColor;
+    case kColorId_TableSelectionBackgroundFocused:
+    case kColorId_TableSelectionBackgroundUnfocused:
+      return kTableSelectionBackgroundColor;
+    case kColorId_TableGroupingIndicatorColor:
+      return kTableGroupingIndicatorColor;
+
+    case kColorId_MenuBackgroundColor:
+      return kMenuBackgroundColor;
+    case kColorId_MenuBorderColor:
+      NOTREACHED();
+      break;
+  }
+
+  return kInvalidColorIdColor;
+}
+
+}  // namespace ui