Add a command line option to generate source code for a script

runtime/vm/object.cc

 // 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.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 5312 matching lines @@
 
 
 bool Script::HasSource() const {
   return raw_ptr()->source_ != String::null();
 }
 
 
 RawString* Script::Source() const {
   String& source = String::Handle(raw_ptr()->source_);
   if (source.IsNull()) {
-    const TokenStream& token_stream = TokenStream::Handle(tokens());
-    return token_stream.GenerateSource();
-  } else {
-    return raw_ptr()->source_;
+    return GenerateSource();
   }
+  return raw_ptr()->source_;
+}
+
+
+RawString* Script::GenerateSource() const {
+  const TokenStream& token_stream = TokenStream::Handle(tokens());
+  return token_stream.GenerateSource();
 }
 
 
 void Script::set_url(const String& value) const {
   StorePointer(&raw_ptr()->url_, value.raw());
 }
 
 
 void Script::set_source(const String& value) const {
   StorePointer(&raw_ptr()->source_, value.raw());
@@ skipping 8049 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart