Make classes and structures in core/style, core/plugins and core/streams fast-allocated.

Source/core/plugins/testing/DictionaryPluginPlaceholder.h

 // 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 DictionaryPluginPlaceholder_h
 #define DictionaryPluginPlaceholder_h
 
 #include "core/html/shadow/PluginPlaceholderElement.h"
 #include "core/plugins/PluginPlaceholder.h"
 #include "core/testing/PluginPlaceholderOptions.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 // Manipulates a plugin placeholder element based on a fixed dictionary given.
 // Used for layout tests that examine the formatting of structured placeholders.
-class DictionaryPluginPlaceholder : public NoBaseWillBeGarbageCollected<DictionaryPluginPlaceholder>, public PluginPlaceholder {
+class DictionaryPluginPlaceholder final : public NoBaseWillBeGarbageCollected<DictionaryPluginPlaceholder>, public PluginPlaceholder {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DictionaryPluginPlaceholder);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DictionaryPluginPlaceholder);
 public:
     static PassOwnPtrWillBeRawPtr<DictionaryPluginPlaceholder> create(Document& document, const PluginPlaceholderOptions& options)
     {
         RefPtrWillBeRawPtr<PluginPlaceholderElement> placeholder = PluginPlaceholderElement::create(document);
         if (options.hasMessage())
             placeholder->setMessage(options.message());
 
         if (options.hasCloseable())
             placeholder->setIsCloseable(options.closeable());
 
@@ skipping 13 matching lines @@
 
 private:
     DictionaryPluginPlaceholder(PassRefPtrWillBeRawPtr<PluginPlaceholderElement> element) : m_pluginPlaceholderElement(element) { }
 
     RefPtrWillBeMember<PluginPlaceholderElement> m_pluginPlaceholderElement;
 };
 
 } // namespace blink
 
 #endif // DictionaryPluginPlaceholder_h