compositor-worker: Remove code from cc_blink

cc/blink/web_compositor_mutable_state_impl.h

Index: cc/blink/web_compositor_mutable_state_impl.h
diff --git a/cc/blink/web_compositor_mutable_state_impl.h b/cc/blink/web_compositor_mutable_state_impl.h
deleted file mode 100644
index b052eca876c08f48c03758ccd2d0663b4d1e8e53..0000000000000000000000000000000000000000
--- a/cc/blink/web_compositor_mutable_state_impl.h
+++ /dev/null
@@ -1,46 +0,0 @@
-// 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_BLINK_WEB_COMPOSITOR_MUTABLE_STATE_IMPL_H_
-#define CC_BLINK_WEB_COMPOSITOR_MUTABLE_STATE_IMPL_H_
-
-#include "cc/blink/cc_blink_export.h"
-
-#include "third_party/WebKit/public/platform/WebCompositorMutableState.h"
-
-namespace cc {
-class LayerImpl;
-class LayerTreeMutation;
-}
-
-namespace cc_blink {
-
-class WebCompositorMutableStateImpl : public blink::WebCompositorMutableState {
- public:
-  WebCompositorMutableStateImpl(cc::LayerTreeMutation* mutation,
-                                cc::LayerImpl* main_layer,
-                                cc::LayerImpl* scroll_layer);
-  ~WebCompositorMutableStateImpl() override;
-
-  double opacity() const override;
-  void setOpacity(double opacity) override;
-
-  const SkMatrix44& transform() const override;
-  void setTransform(const SkMatrix44& transform) override;
-
-  double scrollLeft() const override;
-  void setScrollLeft(double scroll_left) override;
-
-  double scrollTop() const override;
-  void setScrollTop(double scroll_top) override;
-
- private:
-  cc::LayerTreeMutation* mutation_;
-  cc::LayerImpl* main_layer_;
-  cc::LayerImpl* scroll_layer_;
-};
-
-}  // namespace cc_blink
-
-#endif  // CC_BLINK_WEB_COMPOSITOR_MUTABLE_STATE_IMPL_H_