Keep two empty lines between declarations for cpp files

test/cctest/test-log.cc

Index: test/cctest/test-log.cc
===================================================================
--- test/cctest/test-log.cc	(revision 15486)
+++ test/cctest/test-log.cc	(working copy)
@@ -395,6 +395,7 @@
 static void ObjMethod1(const v8::FunctionCallbackInfo<v8::Value>& args) {
 }
 
+
 TEST(LogCallbacks) {
   ScopedLoggerInitializer initialize_logger(false);
   Logger* logger = initialize_logger.logger();
@@ -443,6 +444,7 @@
                         const v8::PropertyCallbackInfo<v8::Value>& info) {
 }
 
+
 TEST(LogAccessorCallbacks) {
   ScopedLoggerInitializer initialize_logger(false);
   Logger* logger = initialize_logger.logger();