Make Dart_GetClass work for private classes.

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 1715 matching lines @@
   }
   void SetLoadError() const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawLibrary));
   }
 
   static RawLibrary* New(const String& url);
 
   // Library scope name dictionary.
+  //
+  // TODO(turnidge): The Lookup functions are not consistent in how
+  // they deal with private names.  Go through and make them a bit
+  // more regular.
   void AddClass(const Class& cls) const;
   void AddObject(const Object& obj, const String& name) const;
   RawObject* LookupObject(const String& name) const;
   RawClass* LookupClass(const String& name) const;
+  RawClass* LookupClassAllowPrivate(const String& name) const;
   RawObject* LookupLocalObject(const String& name) const;
   RawClass* LookupLocalClass(const String& name) const;
   RawField* LookupFieldAllowPrivate(const String& name) const;
   RawField* LookupLocalField(const String& name) const;
   RawFunction* LookupFunctionAllowPrivate(const String& name) const;
   RawFunction* LookupLocalFunction(const String& name) const;
   RawLibraryPrefix* LookupLocalLibraryPrefix(const String& name) const;
   RawScript* LookupScript(const String& url) const;
   RawArray* LoadedScripts() const;
 
@@ skipping 3194 matching lines @@
 }
 
 
 intptr_t Stackmap::SizeInBits() const {
   return (Smi::Value(raw_ptr()->bitmap_size_in_bytes_) * kBitsPerByte);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_