PurgeMemory.

third_party/WebKit/Source/core/css/StyleRuleNamespace.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 StyleRuleNamespace_h
 #define StyleRuleNamespace_h
 
 #include "core/css/StyleRule.h"
 
 namespace blink {
 
 // This class is never actually stored anywhere currently, but only used for
 // the parser to pass to a stylesheet
 class StyleRuleNamespace final : public StyleRuleBase {
     USING_FAST_MALLOC_WILL_BE_REMOVED(StyleRuleNamespace);
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleNamespace> create(AtomicString prefix, AtomicString uri)
     {
         return adoptRefWillBeNoop(new StyleRuleNamespace(prefix, uri));
     }
 
     AtomicString prefix() const { return m_prefix; }
     AtomicString uri() const { return m_uri; }
 
+    void purgeMemory() { }
+
     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleBase::traceAfterDispatch(visitor); }
 
 private:
     StyleRuleNamespace(AtomicString prefix, AtomicString uri)
     : StyleRuleBase(Namespace)
     , m_prefix(prefix)
     , m_uri(uri)
     { }
 
     AtomicString m_prefix;
     AtomicString m_uri;
 };
 
 DEFINE_STYLE_RULE_TYPE_CASTS(Namespace);
 
 } // namespace blink
 
 #endif // StyleRuleNamespace_h