Remove parts of //cc we aren't using

cc/animation/scrollbar_animation_controller.cc

Index: cc/animation/scrollbar_animation_controller.cc
diff --git a/cc/animation/scrollbar_animation_controller.cc b/cc/animation/scrollbar_animation_controller.cc
deleted file mode 100644
index 48b199d6e665388e0021dd80dd4c97f84c5a5d4f..0000000000000000000000000000000000000000
--- a/cc/animation/scrollbar_animation_controller.cc
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2014 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 "cc/animation/scrollbar_animation_controller.h"
-
-#include <algorithm>
-
-#include "base/time/time.h"
-#include "cc/trees/layer_tree_impl.h"
-
-namespace cc {
-
-ScrollbarAnimationController::ScrollbarAnimationController(
-    LayerImpl* scroll_layer,
-    ScrollbarAnimationControllerClient* client,
-    base::TimeDelta delay_before_starting,
-    base::TimeDelta resize_delay_before_starting,
-    base::TimeDelta duration)
-    : scroll_layer_(scroll_layer),
-      client_(client),
-      delay_before_starting_(delay_before_starting),
-      resize_delay_before_starting_(resize_delay_before_starting),
-      duration_(duration),
-      is_animating_(false),
-      currently_scrolling_(false),
-      scroll_gesture_has_scrolled_(false),
-      weak_factory_(this) {
-}
-
-ScrollbarAnimationController::~ScrollbarAnimationController() {
-  if (is_animating_)
-    client_->StopAnimatingScrollbarAnimationController(this);
-}
-
-void ScrollbarAnimationController::Animate(base::TimeTicks now) {
-  if (!is_animating_)
-    return;
-
-  if (last_awaken_time_.is_null())
-    last_awaken_time_ = now;
-
-  float progress = AnimationProgressAtTime(now);
-  RunAnimationFrame(progress);
-}
-
-float ScrollbarAnimationController::AnimationProgressAtTime(
-    base::TimeTicks now) {
-  base::TimeDelta delta = now - last_awaken_time_;
-  float progress = delta.InSecondsF() / duration_.InSecondsF();
-  return std::max(std::min(progress, 1.f), 0.f);
-}
-
-void ScrollbarAnimationController::DidScrollBegin() {
-  currently_scrolling_ = true;
-}
-
-void ScrollbarAnimationController::DidScrollUpdate(bool on_resize) {
-  StopAnimation();
-  delayed_scrollbar_fade_.Cancel();
-
-  // As an optimization, we avoid spamming fade delay tasks during active fast
-  // scrolls.  But if we're not within one, we need to post every scroll update.
-  if (!currently_scrolling_)
-    PostDelayedAnimationTask(on_resize);
-  else
-    scroll_gesture_has_scrolled_ = true;
-}
-
-void ScrollbarAnimationController::DidScrollEnd() {
-  if (scroll_gesture_has_scrolled_) {
-    PostDelayedAnimationTask(false);
-    scroll_gesture_has_scrolled_ = false;
-  }
-
-  currently_scrolling_ = false;
-}
-
-void ScrollbarAnimationController::PostDelayedAnimationTask(bool on_resize) {
-  base::TimeDelta delay =
-      on_resize ? resize_delay_before_starting_ : delay_before_starting_;
-  delayed_scrollbar_fade_.Reset(
-      base::Bind(&ScrollbarAnimationController::StartAnimation,
-                 weak_factory_.GetWeakPtr()));
-  client_->PostDelayedScrollbarAnimationTask(delayed_scrollbar_fade_.callback(),
-                                             delay);
-}
-
-void ScrollbarAnimationController::StartAnimation() {
-  delayed_scrollbar_fade_.Cancel();
-  is_animating_ = true;
-  last_awaken_time_ = base::TimeTicks();
-  client_->StartAnimatingScrollbarAnimationController(this);
-}
-
-void ScrollbarAnimationController::StopAnimation() {
-  is_animating_ = false;
-  client_->StopAnimatingScrollbarAnimationController(this);
-}
-
-}  // namespace cc