Fix lineprocessor sample and include it in the gyp build.

Based on a patch by Peter Rybin <peter.rybin@gmail.com> https://chromiumcodereview.appspot.com/10081030/

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9972006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11326 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

samples/lineprocessor.cc

-// Copyright 2009 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -434,9 +434,9 @@ v8::Handle<v8::String> ReadLine() {
   }
   if (res == NULL) {
     v8::Handle<v8::Primitive> t = v8::Undefined();
-    return reinterpret_cast<v8::Handle<v8::String>&>(t);
+    return v8::Handle<v8::String>(v8::String::Cast(*t));
   }
-  // remove newline char
+  // Remove newline char
   for (char* pos = buffer; *pos != '\0'; pos++) {
     if (*pos == '\n') {
       *pos = '\0';

samples/samples.gyp

-# Copyright 2011 the V8 project authors. All rights reserved.
+# Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ -48,6 +48,12 @@
       'sources': [
         'process.cc',
       ],
+    },
+    {
+      'target_name': 'lineprocessor',
+      'sources': [
+        'lineprocessor.cc',
+      ],
     }
   ],
 }