Support correct factory syntax in the VM as decribed in the spec.

runtime/vm/raw_object.h

 // Copyright (c) 2011, 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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "vm/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 181 matching lines @@
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   RawArray* functions_;
   RawArray* fields_;
   RawArray* interfaces_;  // Array of Type.
   RawScript* script_;
   RawLibrary* library_;
   RawArray* type_parameters_;  // Array of String.
   RawTypeArray* type_parameter_extends_;  // DynamicType if no extends clause.
   RawType* super_type_;
-  RawType* factory_type_;
+  RawObject* factory_class_;  // UnresolvedClass (until finalization) or Class.
   RawFunction* signature_function_;  // Associated function for signature class.
   RawArray* functions_cache_;  // See class FunctionsCache.
   RawArray* constants_;  // Canonicalized values of this class.
   RawArray* canonical_types_;  // Canonicalized types of this class.
   RawCode* allocation_stub_;  // Stub code for allocation of instances.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->allocation_stub_);
   }
 
   cpp_vtable handle_vtable_;
@@ skipping 11 matching lines @@
 };
 
 
 class RawUnresolvedClass : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(UnresolvedClass);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->qualifier_);
   }
   RawString* qualifier_;  // Qualifier for the identifier.
-  RawString* ident_;  // name of the unresolved identifier.
-  RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->ident_); }
+  RawString* ident_;  // Name of the unresolved identifier.
+  RawClass* factory_signature_class_;  // Expected type parameters for factory.
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->factory_signature_class_);
+  }
   intptr_t token_index_;
 };
 
 
 class RawType : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Type);
 
   friend class ObjectStore;
 };
 
@@ skipping 523 matching lines @@
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_