Remove parts of //cc we aren't using

cc/test/fake_scrollbar.h

-// Copyright 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.
-
-#ifndef CC_TEST_FAKE_SCROLLBAR_H_
-#define CC_TEST_FAKE_SCROLLBAR_H_
-
-#include "base/compiler_specific.h"
-#include "cc/input/scrollbar.h"
-#include "third_party/skia/include/core/SkColor.h"
-
-namespace cc {
-
-class FakeScrollbar : public Scrollbar {
- public:
-  FakeScrollbar();
-  FakeScrollbar(bool paint, bool has_thumb, bool is_overlay);
-  ~FakeScrollbar() override;
-
-  // Scrollbar implementation.
-  ScrollbarOrientation Orientation() const override;
-  bool IsLeftSideVerticalScrollbar() const override;
-  gfx::Point Location() const override;
-  bool IsOverlay() const override;
-  bool HasThumb() const override;
-  int ThumbThickness() const override;
-  int ThumbLength() const override;
-  gfx::Rect TrackRect() const override;
-  void PaintPart(SkCanvas* canvas,
-                 ScrollbarPart part,
-                 const gfx::Rect& content_rect) override;
-
-  void set_location(const gfx::Point& location) { location_ = location; }
-  void set_track_rect(const gfx::Rect& track_rect) { track_rect_ = track_rect; }
-  void set_thumb_thickness(int thumb_thickness) {
-      thumb_thickness_ = thumb_thickness;
-  }
-  void set_thumb_length(int thumb_length) { thumb_length_ = thumb_length; }
-  void set_has_thumb(bool has_thumb) { has_thumb_ = has_thumb; }
-  SkColor paint_fill_color() const { return SK_ColorBLACK | fill_color_; }
-
- private:
-  bool paint_;
-  bool has_thumb_;
-  bool is_overlay_;
-  int thumb_thickness_;
-  int thumb_length_;
-  gfx::Point location_;
-  gfx::Rect track_rect_;
-  SkColor fill_color_;
-
-  DISALLOW_COPY_AND_ASSIGN(FakeScrollbar);
-};
-
-}  // namespace cc
-
-#endif  // CC_TEST_FAKE_SCROLLBAR_H_