Keep two empty lines between declarations for cpp files

test/cctest/test-compare-nil-ic-stub.cc

 // Copyright 2006-2013 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 25 matching lines @@
 
 typedef CompareNilICStub::State State;
 
 TEST(StateConstructors) {
   State state;
   state.Add(CompareNilICStub::MONOMORPHIC_MAP);
   State state2(state);
   CHECK_EQ(state.ToIntegral(), state2.ToIntegral());
 }
 
+
 TEST(ExternalICStateParsing) {
   State state;
   state.Add(CompareNilICStub::UNDEFINED);
   CompareNilICStub stub(kUndefinedValue, state);
   CompareNilICStub stub2(stub.GetExtraICState());
   CHECK_EQ(stub.GetNilValue(), stub2.GetNilValue());
   CHECK_EQ(stub.GetState().ToIntegral(), stub2.GetState().ToIntegral());
 }
 
+
 TEST(SettingState) {
   State state;
   CHECK(state.IsEmpty());
   state.Add(CompareNilICStub::NULL_TYPE);
   CHECK(!state.IsEmpty());
   CHECK(state.Contains(CompareNilICStub::NULL_TYPE));
   CHECK(!state.Contains(CompareNilICStub::UNDEFINED));
   CHECK(!state.Contains(CompareNilICStub::UNDETECTABLE));
   state.Add(CompareNilICStub::UNDEFINED);
   CHECK(state.Contains(CompareNilICStub::UNDEFINED));
   CHECK(state.Contains(CompareNilICStub::NULL_TYPE));
   CHECK(!state.Contains(CompareNilICStub::UNDETECTABLE));
 }
 
+
 TEST(ClearState) {
   State state;
   state.Add(CompareNilICStub::NULL_TYPE);
   state.RemoveAll();
   CHECK(state.IsEmpty());
 }
 
+
 TEST(Generic) {
   State state;
   CHECK(State::Generic() != state);
   state.Add(CompareNilICStub::UNDEFINED);
   CHECK(state != State::Generic());
   state.Add(CompareNilICStub::NULL_TYPE);
   CHECK(state != State::Generic());
   state.Add(CompareNilICStub::UNDETECTABLE);
   CHECK(state != State::Generic());
   state.Add(CompareNilICStub::GENERIC);
   CHECK(state == State::Generic());
 }