Add option to gen_snapshot for creating a Makefile describing a snapshot's dependencies.

runtime/vm/visitor.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 RUNTIME_VM_VISITOR_H_
 #define RUNTIME_VM_VISITOR_H_
 
 #include "vm/allocation.h"
 #include "vm/globals.h"
 #include "vm/growable_array.h"
 
 namespace dart {
 
 // Forward declarations.
 class Isolate;
 class RawObject;
+class RawFunction;
 
 // An object pointer visitor interface.
 class ObjectPointerVisitor {
  public:
   explicit ObjectPointerVisitor(Isolate* isolate) : isolate_(isolate) {}
   virtual ~ObjectPointerVisitor() {}
 
   Isolate* isolate() const { return isolate_; }
 
   // Range of pointers to visit 'first' <= pointer <= 'last'.
@@ skipping 47 matching lines @@
   // Check if object matches find condition.
   virtual bool FindObject(RawObject* obj) const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FindObjectVisitor);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_VISITOR_H_