compositor-worker: Remove code from cc_blink

cc/animation/layer_tree_mutation.h

-// 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.
-
-#ifndef CC_ANIMATION_LAYER_TREE_MUTATION_H_
-#define CC_ANIMATION_LAYER_TREE_MUTATION_H_
-
-#include "base/containers/hash_tables.h"
-#include "cc/animation/mutable_properties.h"
-#include "third_party/skia/include/utils/SkMatrix44.h"
-
-namespace cc {
-
-class LayerTreeMutation {
- public:
-  void SetOpacity(float opacity) {
-    mutated_flags_ |= kMutablePropertyOpacity;
-    opacity_ = opacity;
-  }
-  void SetScrollLeft(float scroll_left) {
-    mutated_flags_ |= kMutablePropertyScrollLeft;
-    scroll_left_ = scroll_left;
-  }
-  void SetScrollTop(float scroll_top) {
-    mutated_flags_ |= kMutablePropertyScrollTop;
-    scroll_top_ = scroll_top;
-  }
-  void SetTransform(const SkMatrix44& transform) {
-    mutated_flags_ |= kMutablePropertyTransform;
-    transform_ = transform;
-  }
-
-  bool is_opacity_mutated() const {
-    return !!(mutated_flags_ & kMutablePropertyOpacity);
-  }
-  bool is_scroll_left_mutated() const {
-    return !!(mutated_flags_ & kMutablePropertyScrollLeft);
-  }
-  bool is_scroll_top_mutated() const {
-    return !!(mutated_flags_ & kMutablePropertyScrollTop);
-  }
-  bool is_transform_mutated() const {
-    return !!(mutated_flags_ & kMutablePropertyTransform);
-  }
-
-  float opacity() const { return opacity_; }
-  float scroll_left() const { return scroll_left_; }
-  float scroll_top() const { return scroll_top_; }
-  SkMatrix44 transform() const { return transform_; }
-
- private:
-  uint32_t mutated_flags_ = 0;
-  float opacity_ = 0;
-  float scroll_left_ = 0;
-  float scroll_top_ = 0;
-  SkMatrix44 transform_;
-};
-
-typedef base::hash_map<uint64_t, LayerTreeMutation> LayerTreeMutationMap;
-
-}  // namespace cc
-
-#endif  // CC_ANIMATION_LAYER_TREE_MUTATION_H_