Remove AtomicStringImpl.

Source/core/html/FormController.cpp

Index: Source/core/html/FormController.cpp
diff --git a/Source/core/html/FormController.cpp b/Source/core/html/FormController.cpp
index 57436bba039a25cedd2d44c21cebaadf6b63b54b..5ec2d07cf7282f422515157079b8f23674b18293 100644
--- a/Source/core/html/FormController.cpp
+++ b/Source/core/html/FormController.cpp
@@ -81,13 +81,13 @@ FormControlState FormControlState::deserialize(const Vector<String>& stateVector
 
 class FormElementKey {
 public:
-    FormElementKey(AtomicStringImpl* = 0, AtomicStringImpl* = 0);
+    FormElementKey(StringImpl* = 0, StringImpl* = 0);
     ~FormElementKey();
     FormElementKey(const FormElementKey&);
     FormElementKey& operator=(const FormElementKey&);
 
-    AtomicStringImpl* name() const { return m_name; }
-    AtomicStringImpl* type() const { return m_type; }
+    StringImpl* name() const { return m_name; }
+    StringImpl* type() const { return m_type; }
 
     // Hash table deleted values, which are only constructed and never copied or destroyed.
     FormElementKey(WTF::HashTableDeletedValueType) : m_name(hashTableDeletedValue()) { }
@@ -97,13 +97,13 @@ private:
     void ref() const;
     void deref() const;
 
-    static AtomicStringImpl* hashTableDeletedValue() { return reinterpret_cast<AtomicStringImpl*>(-1); }
+    static StringImpl* hashTableDeletedValue() { return reinterpret_cast<StringImpl*>(-1); }
 
-    AtomicStringImpl* m_name;
-    AtomicStringImpl* m_type;
+    StringImpl* m_name;
+    StringImpl* m_type;
 };
 
-FormElementKey::FormElementKey(AtomicStringImpl* name, AtomicStringImpl* type)
+FormElementKey::FormElementKey(StringImpl* name, StringImpl* type)
     : m_name(name)
     , m_type(type)
 {