Delete most of rendering/compositing.

sky/engine/core/rendering/compositing/CompositingReasonFinder.h

Index: sky/engine/core/rendering/compositing/CompositingReasonFinder.h
diff --git a/sky/engine/core/rendering/compositing/CompositingReasonFinder.h b/sky/engine/core/rendering/compositing/CompositingReasonFinder.h
deleted file mode 100644
index b750131006c16071e7630e1deb307aa9be93204c..0000000000000000000000000000000000000000
--- a/sky/engine/core/rendering/compositing/CompositingReasonFinder.h
+++ /dev/null
@@ -1,42 +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.
-
-#ifndef SKY_ENGINE_CORE_RENDERING_COMPOSITING_COMPOSITINGREASONFINDER_H_
-#define SKY_ENGINE_CORE_RENDERING_COMPOSITING_COMPOSITINGREASONFINDER_H_
-
-#include "sky/engine/core/rendering/RenderLayer.h"
-#include "sky/engine/core/rendering/compositing/CompositingTriggers.h"
-#include "sky/engine/platform/graphics/CompositingReasons.h"
-
-namespace blink {
-
-class RenderObject;
-class RenderView;
-
-class CompositingReasonFinder {
-    WTF_MAKE_NONCOPYABLE(CompositingReasonFinder);
-public:
-    explicit CompositingReasonFinder(RenderView&);
-
-    CompositingReasons potentialCompositingReasonsFromStyle(RenderObject*) const;
-    CompositingReasons directReasons(const RenderLayer*) const;
-
-    void updateTriggers();
-
-    bool hasOverflowScrollTrigger() const;
-    bool requiresCompositingForScrollableFrame() const;
-
-private:
-    CompositingReasons nonStyleDeterminedDirectReasons(const RenderLayer*) const;
-
-    bool requiresCompositingForTransform(RenderObject*) const;
-    bool requiresCompositingForAnimation(RenderStyle*) const;
-
-    RenderView& m_renderView;
-    CompositingTriggerFlags m_compositingTriggers;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_RENDERING_COMPOSITING_COMPOSITINGREASONFINDER_H_