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

Source/core/dom/QualifiedName.h

Index: Source/core/dom/QualifiedName.h
diff --git a/Source/core/dom/QualifiedName.h b/Source/core/dom/QualifiedName.h
index a0266fca9bfcabd28bc12192fb29befb9d4c5e2a..0e48ab795b37d78d8412be7fbf1108f1d229128b 100644
--- a/Source/core/dom/QualifiedName.h
+++ b/Source/core/dom/QualifiedName.h
@@ -22,6 +22,7 @@
 #define QualifiedName_h
 
 #include "core/CoreExport.h"
+#include "wtf/Allocator.h"
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/HashTraits.h"
 #include "wtf/RefCounted.h"
@@ -30,6 +31,7 @@
 namespace blink {
 
 struct QualifiedNameComponents {
+    DISALLOW_ALLOCATION();
     StringImpl* m_prefix;
     StringImpl* m_localName;
     StringImpl* m_namespace;
@@ -38,6 +40,7 @@ struct QualifiedNameComponents {
 // This struct is used to pass data between QualifiedName and the QNameTranslator.
 // For hashing and equality only the QualifiedNameComponents fields are used.
 struct QualifiedNameData {
+    DISALLOW_ALLOCATION();
     QualifiedNameComponents m_components;
     bool m_isStatic;
 };
@@ -153,6 +156,7 @@ inline unsigned hashComponents(const QualifiedNameComponents& buf)
 }
 
 struct QualifiedNameHash {
+    STATIC_ONLY(QualifiedNameHash);
     static unsigned hash(const QualifiedName& name) { return hash(name.impl()); }
 
     static unsigned hash(const QualifiedName::QualifiedNameImpl* name)