Convert String to a class.

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3167 matching lines @@
 
   // Check if this type represents the 'int' type.
   bool IsIntType() const;
 
   // Check if this type represents the 'double' type.
   bool IsDoubleType() const;
 
   // Check if this type represents the 'num' type.
   bool IsNumberType() const;
 
-  // Check if this type represents the 'String' interface.
-  bool IsStringInterface() const;
+  // Check if this type represents the 'String' type.
+  bool IsStringType() const;
 
   // Check if this type represents the 'Function' type.
   bool IsFunctionType() const;
 
   // Check if this type represents the 'List' interface.
   bool IsListInterface() const;
 
   // Check if this type is an interface type.
   bool IsInterfaceType() const {
     if (!HasResolvedTypeClass()) {
@@ skipping 102 matching lines @@
 
   // The 'Mint' type.
   static RawType* MintType();
 
   // The 'double' type.
   static RawType* Double();
 
   // The 'num' interface type.
   static RawType* Number();
 
-  // The 'String' interface type.
-  static RawType* StringInterface();
+  // The 'String' type.
+  static RawType* StringType();
 
   // The 'Function' interface type.
   static RawType* Function();
 
   // The 'List' interface type.
   static RawType* ListInterface();
 
   // The finalized type of the given non-parameterized class.
   static RawType* NewNonParameterizedType(const Class& type_class);
 
@@ skipping 2543 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_