Remove signature classes from the VM.

runtime/vm/object_store.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_STORE_H_
 #define VM_OBJECT_STORE_H_
 
 #include "vm/object.h"
 
 namespace dart {
@@ skipping 49 matching lines @@
   RawType* null_type() const { return null_type_; }
   void set_null_type(const Type& value) {
     null_type_ = value.raw();
   }
 
   RawType* function_type() const { return function_type_; }
   void set_function_type(const Type& value) {
     function_type_ = value.raw();
   }
 
-  RawType* function_impl_type() const { return function_impl_type_; }
-  void set_function_impl_type(const Type& value) {
-    function_impl_type_ = value.raw();
+  RawClass* closure_class() const { return closure_class_; }
+  void set_closure_class(const Class& value) {
+    closure_class_ = value.raw();
   }
 
   RawType* number_type() const { return number_type_; }
   void set_number_type(const Type& value) {
     number_type_ = value.raw();
   }
 
   RawType* int_type() const { return int_type_; }
   void set_int_type(const Type& value) {
     int_type_ = value.raw();
@@ skipping 414 matching lines @@
 
  private:
   ObjectStore();
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&object_class_); }
   RawClass* object_class_;
   RawType* object_type_;
   RawClass* null_class_;
   RawType* null_type_;
   RawType* function_type_;
-  RawType* function_impl_type_;
+  RawClass* closure_class_;
   RawType* number_type_;
   RawType* int_type_;
   RawClass* integer_implementation_class_;
   RawClass* smi_class_;
   RawType* smi_type_;
   RawClass* mint_class_;
   RawType* mint_type_;
   RawClass* bigint_class_;
   RawClass* double_class_;
   RawType* double_type_;
@@ skipping 72 matching lines @@
   friend class FullSnapshotWriter;
   friend class SnapshotReader;
   friend class VmIsolateSnapshotReader;
 
   DISALLOW_COPY_AND_ASSIGN(ObjectStore);
 };
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_STORE_H_