Make classes and structures in web fast-allocated.

Source/web/DevToolsEmulator.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 DevToolsEmulator_h
 #define DevToolsEmulator_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
 class InspectorEmulationAgent;
 class IntPoint;
 class WebInputEvent;
 class WebViewImpl;
 
 struct WebDeviceEmulationParams;
 
 class DevToolsEmulator final : public NoBaseWillBeGarbageCollectedFinalized<DevToolsEmulator> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DevToolsEmulator);
 public:
     ~DevToolsEmulator();
     static PassOwnPtrWillBeRawPtr<DevToolsEmulator> create(WebViewImpl*);
     DECLARE_TRACE();
 
     void setEmulationAgent(InspectorEmulationAgent*);
     void viewportChanged();
 
     // Settings overrides.
     void setTextAutosizingEnabled(bool);
@@ skipping 44 matching lines @@
     OwnPtr<IntPoint> m_lastPinchAnchorDip;
 
     bool m_embedderScriptEnabled;
     bool m_scriptExecutionDisabled;
     bool m_hidePinchScrollbarsNearMinScale;
 };
 
 } // namespace blink
 
 #endif