ui: Cleanup class/struct forward declarations

ui/views/controls/scrollbar/native_scroll_bar.cc

Index: ui/views/controls/scrollbar/native_scroll_bar.cc
diff --git a/ui/views/controls/scrollbar/native_scroll_bar.cc b/ui/views/controls/scrollbar/native_scroll_bar.cc
deleted file mode 100644
index a768af5e52edd160ec5fa8d56697af4a424a42f1..0000000000000000000000000000000000000000
--- a/ui/views/controls/scrollbar/native_scroll_bar.cc
+++ /dev/null
@@ -1,113 +0,0 @@
-// 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/views/controls/scrollbar/native_scroll_bar.h"
-
-#include <algorithm>
-#include <string>
-
-#include "base/message_loop/message_loop.h"
-#include "ui/events/event.h"
-#include "ui/views/controls/scrollbar/native_scroll_bar_views.h"
-#include "ui/views/controls/scrollbar/native_scroll_bar_wrapper.h"
-#include "ui/views/widget/widget.h"
-
-namespace views {
-
-// static
-const char NativeScrollBar::kViewClassName[] = "NativeScrollBar";
-
-////////////////////////////////////////////////////////////////////////////////
-// NativeScrollBar, public:
-NativeScrollBar::NativeScrollBar(bool is_horizontal)
-    : ScrollBar(is_horizontal),
-      native_wrapper_(NULL) {
-}
-
-NativeScrollBar::~NativeScrollBar() {
-}
-
-// static
-int NativeScrollBar::GetHorizontalScrollBarHeight(
-    const ui::NativeTheme* theme) {
-  return NativeScrollBarWrapper::GetHorizontalScrollBarHeight(theme);
-}
-
-// static
-int NativeScrollBar::GetVerticalScrollBarWidth(
-    const ui::NativeTheme* theme) {
-  return NativeScrollBarWrapper::GetVerticalScrollBarWidth(theme);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// NativeScrollBar, View overrides:
-gfx::Size NativeScrollBar::GetPreferredSize() const {
-  if (native_wrapper_)
-    return native_wrapper_->GetView()->GetPreferredSize();
-  return gfx::Size();
-}
-
-void NativeScrollBar::Layout() {
-  if (native_wrapper_) {
-    native_wrapper_->GetView()->SetBounds(0, 0, width(), height());
-    native_wrapper_->GetView()->Layout();
-  }
-}
-
-void NativeScrollBar::ViewHierarchyChanged(
-    const ViewHierarchyChangedDetails& details) {
-  if (details.is_add && !native_wrapper_ && GetWidget()) {
-    native_wrapper_ = NativeScrollBarWrapper::CreateWrapper(this);
-    AddChildView(native_wrapper_->GetView());
-  }
-}
-
-const char* NativeScrollBar::GetClassName() const {
-  return kViewClassName;
-}
-
-// Overridden from View for keyboard UI.
-bool NativeScrollBar::OnKeyPressed(const ui::KeyEvent& event) {
-  if (!native_wrapper_)
-    return false;
-  return native_wrapper_->GetView()->OnKeyPressed(event);
-}
-
-void NativeScrollBar::OnGestureEvent(ui::GestureEvent* event) {
-  if (!native_wrapper_)
-    return;
-  native_wrapper_->GetView()->OnGestureEvent(event);
-}
-
-bool NativeScrollBar::OnMouseWheel(const ui::MouseWheelEvent& event) {
-  if (!native_wrapper_)
-    return false;
-  return native_wrapper_->GetView()->OnMouseWheel(event);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// NativeScrollBar, ScrollBar overrides:
-void NativeScrollBar::Update(int viewport_size,
-                             int content_size,
-                             int current_pos) {
-  ScrollBar::Update(viewport_size, content_size, current_pos);
-
-  if (native_wrapper_)
-    native_wrapper_->Update(viewport_size, content_size, current_pos);
-}
-
-int NativeScrollBar::GetLayoutSize() const {
-  return IsHorizontal() ?
-      GetHorizontalScrollBarHeight(GetNativeTheme()) :
-      GetVerticalScrollBarWidth(GetNativeTheme());
-}
-
-int NativeScrollBar::GetPosition() const {
-  if (!native_wrapper_)
-    return 0;
-  return native_wrapper_->GetPosition();
-}
-
-}  // namespace views
-