Added {Zone}GrowableHandlePtrArray types: simplifies code, makes code safer

runtime/vm/growable_array_test.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 "platform/assert.h"
 #include "vm/growable_array.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
@@ skipping 78 matching lines @@
   GrowableArray<int> g;
   g.Add(12);
   g.Add(4);
   g.Add(64);
   g.Add(8);
   g.Sort(greatestFirst);
   EXPECT_EQ(64, g[0]);
   EXPECT_EQ(4, g.Last());
 }
 
+
+TEST_CASE(GrowableHandlePtr) {
+  Zone* zone = Thread::Current()->zone();
+  GrowableHandlePtrArray<const String> test1(zone, 1);
+  EXPECT_EQ(0, test1.length());
+  test1.Add(Symbols::Int());
+  EXPECT(test1[0].raw() == Symbols::Int().raw());
+  EXPECT_EQ(1, test1.length());
+
+  ZoneGrowableHandlePtrArray<const String>* test2 =
+      new ZoneGrowableHandlePtrArray<const String>(zone, 1);
+  test2->Add(Symbols::GetterPrefix());
+  EXPECT((*test2)[0].raw() == Symbols::GetterPrefix().raw());
+  EXPECT_EQ(1, test2->length());
+}
+
 }  // namespace dart