Keep two empty lines between declarations for cpp files

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

Index: test/cctest/test-compare-nil-ic-stub.cc
===================================================================
--- test/cctest/test-compare-nil-ic-stub.cc	(revision 15486)
+++ test/cctest/test-compare-nil-ic-stub.cc	(working copy)
@@ -43,6 +43,7 @@
   CHECK_EQ(state.ToIntegral(), state2.ToIntegral());
 }
 
+
 TEST(ExternalICStateParsing) {
   State state;
   state.Add(CompareNilICStub::UNDEFINED);
@@ -52,6 +53,7 @@
   CHECK_EQ(stub.GetState().ToIntegral(), stub2.GetState().ToIntegral());
 }
 
+
 TEST(SettingState) {
   State state;
   CHECK(state.IsEmpty());
@@ -66,6 +68,7 @@
   CHECK(!state.Contains(CompareNilICStub::UNDETECTABLE));
 }
 
+
 TEST(ClearState) {
   State state;
   state.Add(CompareNilICStub::NULL_TYPE);
@@ -73,6 +76,7 @@
   CHECK(state.IsEmpty());
 }
 
+
 TEST(Generic) {
   State state;
   CHECK(State::Generic() != state);