Adding metadata to ArrowButtonView

This is part of the "Views Posse" effort. See this document:
https://docs.google.com/document/d/1Rst3792TjXtVA8k8GXaPD8MnuB1JAneSOpIILdA4268/edit?usp=sharing

Bug: 1159562
Test: build
Change-Id: I4f9845c124968d4fa9e5a10683eadf24228e3868
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2603760Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Shengsong Tan <sstan@google.com>
Cr-Commit-Position: refs/heads/master@{#840889}

ash/login/ui/arrow_button_view.cc

@@ -19,6 +19,7 @@
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/views/controls/highlight_path_generator.h"
+#include "ui/views/metadata/metadata_impl_macros.h"
 
 namespace ash {
 namespace {
@@ -104,10 +105,6 @@ void ArrowButtonView::GetAccessibleNodeData(ui::AXNodeData* node_data) {
     node_data->SetNameExplicitlyEmpty();
 }
 
-const char* ArrowButtonView::GetClassName() const {
-  return "ArrowButtonView";
-}
-
 void ArrowButtonView::SetBackgroundColor(SkColor color) {
   background_color_ = color;
   SchedulePaint();
@@ -149,4 +146,7 @@ void ArrowButtonView::LoadingAnimationDelegate::AnimationProgressed(
   owner_->SchedulePaint();
 }
 
+BEGIN_METADATA(ArrowButtonView, LoginButton)
+END_METADATA
+
 }  // namespace ash

ash/login/ui/arrow_button_view.h

@@ -10,6 +10,7 @@
 #include "ash/login/ui/login_button.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/views/controls/image_view.h"
+#include "ui/views/metadata/metadata_header_macros.h"
 
 namespace gfx {
 class MultiAnimation;
@@ -22,13 +23,16 @@ namespace ash {
 // view.
 class ArrowButtonView : public LoginButton {
  public:
+  METADATA_HEADER(ArrowButtonView);
+
   ArrowButtonView(PressedCallback callback, int size);
+  ArrowButtonView(const ArrowButtonView&) = delete;
+  ArrowButtonView& operator=(const ArrowButtonView&) = delete;
   ~ArrowButtonView() override;
 
   // views::Button:
   void PaintButtonContents(gfx::Canvas* canvas) override;
   void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
-  const char* GetClassName() const override;
 
   // Set background color of the button.
   void SetBackgroundColor(SkColor color);
@@ -59,8 +63,6 @@ class ArrowButtonView : public LoginButton {
   SkColor background_color_;
   LoadingAnimationDelegate loading_animation_delegate_{this};
   std::unique_ptr<gfx::MultiAnimation> loading_animation_;
-
-  DISALLOW_COPY_AND_ASSIGN(ArrowButtonView);
 };
 
 }  // namespace ash