compositor-worker: plumb element id and mutable properties

third_party/WebKit/Source/core/dom/ProxiedPropertyCounts.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 ProxiedPropertyCounts_h
+#define ProxiedPropertyCounts_h
+
+#include "platform/heap/Handle.h"
+#include "public/platform/WebCompositorMutableProperties.h"
+
+namespace blink {
+
+// Keeps track of the number of proxies bound to each property.
+class ProxiedPropertyCounts final : public NoBaseWillBeGarbageCollectedFinalized<ProxiedPropertyCounts> {

[esprehn, 2015/12/02 03:28:49]

CompositorProxiedProperties or PropertySet since this is a set? again this is
too generic in name

[Ian Vollick, 2015/12/03 17:54:43]

I went with CompositorProxiedPropertySet. wdyt?

+    WTF_MAKE_NONCOPYABLE(ProxiedPropertyCounts);
+    USING_FAST_MALLOC_WILL_BE_REMOVED(ProxiedPropertyCounts);
+public:
+    static PassOwnPtrWillBeRawPtr<ProxiedPropertyCounts> create();
+    virtual ~ProxiedPropertyCounts();
+
+    DEFINE_INLINE_TRACE() { }
+
+    bool empty() const;

[esprehn, 2015/12/02 03:28:49]

isEmpty()

[Ian Vollick, 2015/12/03 17:54:43]

Done.

+    void increment(uint32_t mutableProperties);
+    void decrement(uint32_t mutableProperties);
+    uint32_t proxiedProperties() const;
+
+private:
+    ProxiedPropertyCounts();
+
+    unsigned short m_counts[kNumWebCompositorMutableProperties];
+};
+
+} // namespace blink
+
+#endif // ProxiedPropertyCounts_h