Add VectorIconButton functionality to ImageButton.

ui/views/controls/button/vector_icon_button.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/views/controls/button/vector_icon_button.h"
-
-#include "ui/gfx/color_palette.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/paint_vector_icon.h"
-#include "ui/views/border.h"
-#include "ui/views/controls/button/vector_icon_button_delegate.h"
-#include "ui/views/painter.h"
-
-namespace views {
-
-namespace {
-
-// Extra space around the buttons to increase their event target size.
-const int kButtonExtraTouchSize = 4;
-
-}  // namespace
-
-VectorIconButton::VectorIconButton(VectorIconButtonDelegate* delegate)
-    : ImageButton(delegate), delegate_(delegate), icon_(&gfx::kNoneIcon) {
-  SetInkDropMode(InkDropMode::ON);
-  set_has_ink_drop_action_on_click(true);
-  SetImageAlignment(ImageButton::ALIGN_CENTER, ImageButton::ALIGN_MIDDLE);
-  SetFocusPainter(nullptr);
-}
-
-VectorIconButton::~VectorIconButton() {}
-
-void VectorIconButton::SetIcon(const gfx::VectorIcon& icon) {
-  icon_ = &icon;
-  OnSetIcon();
-}
-
-void VectorIconButton::OnThemeChanged() {
-  UpdateImagesAndColors();
-}
-
-void VectorIconButton::OnNativeThemeChanged(const ui::NativeTheme* theme) {
-  UpdateImagesAndColors();
-}
-
-void VectorIconButton::OnSetIcon() {
-  if (!border())
-    SetBorder(CreateEmptyBorder(gfx::Insets(kButtonExtraTouchSize)));
-
-  UpdateImagesAndColors();
-}
-
-void VectorIconButton::UpdateImagesAndColors() {
-  SkColor icon_color =
-      color_utils::DeriveDefaultIconColor(delegate_->GetVectorIconBaseColor());
-  SkColor disabled_color = SkColorSetA(icon_color, 0xff / 2);
-  SetImage(CustomButton::STATE_NORMAL,
-           gfx::CreateVectorIcon(*icon_, icon_color));
-  SetImage(CustomButton::STATE_DISABLED,
-           gfx::CreateVectorIcon(*icon_, disabled_color));
-  set_ink_drop_base_color(icon_color);
-}
-
-}  // namespace views