Added new type of unit test, RAW_UNIT_TEST_CASE, which is used for tests that can be flaky if run w…

runtime/vm/flow_graph_builder_test.cc

 // 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.
 
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/intermediate_language.h"
 #include "vm/unit_test.h"
@@ skipping 754 matching lines @@
 }
 
 #endif  // !PRODUCT
 
 static bool SyntheticRoundTripTest(TokenPosition token_pos) {
   const TokenPosition synthetic_token_pos = token_pos.ToSynthetic();
   return synthetic_token_pos.FromSynthetic() == token_pos;
 }
 
 
-UNIT_TEST_CASE(SourcePosition_SyntheticTokens) {
+VM_UNIT_TEST_CASE(SourcePosition_SyntheticTokens) {
   EXPECT(TokenPosition::kNoSourcePos == -1);
   EXPECT(TokenPosition::kMinSourcePos == 0);
   EXPECT(TokenPosition::kMaxSourcePos > 0);
   EXPECT(TokenPosition::kMaxSourcePos > TokenPosition::kMinSourcePos);
   EXPECT(TokenPosition::kMinSource.value() == TokenPosition::kMinSourcePos);
   EXPECT(TokenPosition::kMaxSource.value() == TokenPosition::kMaxSourcePos);
   EXPECT(!TokenPosition(0).IsSynthetic());
   EXPECT(TokenPosition(0).ToSynthetic().IsSynthetic());
   EXPECT(TokenPosition(9).ToSynthetic().IsSynthetic());
   EXPECT(!TokenPosition(-1).FromSynthetic().IsSynthetic());
   EXPECT(!TokenPosition::kNoSource.IsSynthetic());
   EXPECT(!TokenPosition::kLast.IsSynthetic());
   EXPECT(SyntheticRoundTripTest(TokenPosition(0)));
   EXPECT(SyntheticRoundTripTest(TokenPosition::kMaxSource));
   EXPECT(SyntheticRoundTripTest(TokenPosition::kMinSource));
 }
 
 }  // namespace dart