Keep two empty lines between declarations for cpp files

test/cctest/test-platform-tls.cc

Index: test/cctest/test-platform-tls.cc
===================================================================
--- test/cctest/test-platform-tls.cc	(revision 15486)
+++ test/cctest/test-platform-tls.cc	(working copy)
@@ -43,6 +43,7 @@
   return reinterpret_cast<void*>(static_cast<intptr_t>(num + 1));
 }
 
+
 static void DoTest() {
   for (int i = 0; i < kValueCount; i++) {
     CHECK(!Thread::HasThreadLocal(keys[i]));
@@ -80,6 +81,7 @@
   }
 };
 
+
 TEST(FastTLS) {
   for (int i = 0; i < kValueCount; i++) {
     keys[i] = Thread::CreateThreadLocalKey();