Support for Int64 and fix for the root reference.

pkg/analyzer/test/src/summary/flat_buffers_test.dart

 // Copyright (c) 2016, 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.
 
 library test.src.summary.flat_buffers_test;
 
 import 'package:analyzer/src/summary/flat_buffers.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../reflective_tests.dart';
@@ skipping 68 matching lines @@
       byteList = builder.finish(offset);
     }
     // read and verify
     BufferPointer object = new BufferPointer.fromBytes(byteList).derefObject();
     // was not written, so uses the new default value
     expect(const Int32Reader().vTableGet(object, 0, 15), 15);
     // has the written value
     expect(const Int32Reader().vTableGet(object, 1, 15), 20);
   }
 
+  void test_table_int64() {
+    List<int> byteList;
+    {
+      Builder builder = new Builder(initialSize: 0);
+      builder.startTable();
+      builder.addInt8(0, 10);
+      builder.addInt64(1, 20);
+      builder.addInt8(2, 30);
+      builder.addInt8(3, 40);
+      builder.addInt8(4, 50);
+      Offset offset = builder.endTable();
+      byteList = builder.finish(offset);
+    }
+    // read and verify
+    BufferPointer object = new BufferPointer.fromBytes(byteList).derefObject();
+    expect(const Int8Reader().vTableGet(object, 0), 10);
+    expect(const Int64Reader().vTableGet(object, 1), 20);
+    expect(const Int8Reader().vTableGet(object, 2), 30);
+    expect(const Int8Reader().vTableGet(object, 3), 40);
+    expect(const Int8Reader().vTableGet(object, 4), 50);
+  }
+
   void test_table_types() {
     List<int> byteList;
     {
       Builder builder = new Builder(initialSize: 0);
       Offset<String> stringOffset = builder.writeString('12345');
       builder.startTable();
       builder.addInt8(0, 10);
       builder.addInt32(1, 20);
       builder.addOffset(2, stringOffset);
       builder.addInt32(3, 40);
@@ skipping 107 matching lines @@
 
   int get x => const Int32Reader().vTableGet(bp, 0, 0);
 
   int get y => const Int32Reader().vTableGet(bp, 1, 0);
 
   @override
   TestPointReader createReader(BufferPointer object) {
     return new TestPointReader._(object);
   }
 }