WIP - compositor worker mega patch.

third_party/WebKit/Source/platform/graphics/CompositorMutableState.h

+// Copyright 2016 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 CompositorMutableState_h
+#define CompositorMutableState_h
+
+#include "platform/PlatformExport.h"
+
+#include <cstdint>
+
+class SkMatrix44;
+
+namespace cc {
+class LayerImpl;
+} // namespace cc
+
+namespace blink {
+
+class CompositorMutation;
+
+// This class wraps the compositor-owned, mutable state for a single element.
+class PLATFORM_EXPORT CompositorMutableState {
+public:
+    CompositorMutableState(CompositorMutation*, cc::LayerImpl* main, cc::LayerImpl* scroll);
+    ~CompositorMutableState();
+
+    double opacity() const;
+    void setOpacity(double);
+
+    const SkMatrix44& transform() const;
+    void setTransform(const SkMatrix44&);
+
+    double scrollLeft() const;
+    void setScrollLeft(double);
+
+    double scrollTop() const;
+    void setScrollTop(double);
+
+private:
+    CompositorMutation* m_mutation;
+    cc::LayerImpl* m_mainLayer;
+    cc::LayerImpl* m_scrollLayer;
+};
+
+} // namespace blink
+
+#endif // CompositorMutableState_h