Move views::Label DisabledColor logic into views::LabelButtonLabel

ui/views/controls/button/label_button_label.cc

+// Copyright 2017 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/button/label_button_label.h"
+
+namespace views {
+
+LabelButtonLabel::LabelButtonLabel(const base::string16& text, int text_context)
+    : Label(text, text_context, style::STYLE_PRIMARY) {}
+
+LabelButtonLabel::~LabelButtonLabel() {}
+
+void LabelButtonLabel::SetDisabledColor(SkColor color) {
+  requested_disabled_color_ = color;
+  disabled_color_set_ = true;
+  if (!enabled())
+    Label::SetEnabledColor(color);
+}
+
+void LabelButtonLabel::SetEnabledColor(SkColor color) {
+  requested_enabled_color_ = color;
+  enabled_color_set_ = true;
+  if (enabled())
+    Label::SetEnabledColor(color);
+}
+
+void LabelButtonLabel::OnEnabledChanged() {
+  SetColorForEnableState();
+  Label::OnEnabledChanged();
+}
+
+void LabelButtonLabel::OnNativeThemeChanged(const ui::NativeTheme* theme) {
+  SetColorForEnableState();
+  Label::OnNativeThemeChanged(theme);
+}
+
+void LabelButtonLabel::SetColorForEnableState() {
+  if (enabled() ? enabled_color_set_ : disabled_color_set_) {
+    Label::SetEnabledColor(enabled() ? requested_enabled_color_
+                                     : requested_disabled_color_);
+  } else {
+    int style = enabled() ? style::STYLE_PRIMARY : style::STYLE_DISABLED;
+    Label::SetEnabledColor(
+        style::GetColor(text_context(), style, GetNativeTheme()));
+  }
+}
+
+}  // namespace views