Make classes and structures in core/editing fast-allocated.

Source/core/editing/GranularityStrategy.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 GranularityStrategy_h
 #define GranularityStrategy_h
 
 #include "core/editing/SelectionStrategy.h"
 #include "core/editing/VisibleSelection.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class GranularityStrategy {
+    WTF_MAKE_FAST_ALLOCATED(GranularityStrategy);
 public:
     virtual ~GranularityStrategy();
     virtual SelectionStrategy GetType() const = 0;
     virtual void Clear() = 0;
 
     // Calculates and returns the new selection based on the updated extent
     // location in absolute coordinates.
     virtual VisibleSelection updateExtent(const IntPoint&, LocalFrame*) = 0;
 
 protected:
@@ skipping 86 matching lines @@
 
     // This defines location of the offset-adjusted extent point (from the
     // latest updateExtent call) relative to the location of extent's
     // VisiblePosition. It is used to detect sub-position extent movement.
     IntSize m_diffExtentPointFromExtentPosition;
 };
 
 } // namespace blink
 
 #endif // GranularityStrategy_h