Keep two empty lines between declarations for cpp files

src/v8.cc

Index: src/v8.cc
===================================================================
--- src/v8.cc	(revision 15486)
+++ src/v8.cc	(working copy)
@@ -263,6 +263,7 @@
   return heap_number;
 }
 
+
 void V8::InitializeOncePerProcessImpl() {
   FlagList::EnforceFlagImplications();
   if (FLAG_stress_compaction) {
@@ -323,6 +324,7 @@
   Bootstrapper::InitializeOncePerProcess();
 }
 
+
 void V8::InitializeOncePerProcess() {
   CallOnce(&init_once, &InitializeOncePerProcessImpl);
 }