Keep two empty lines between declarations for cpp files

src/global-handles.cc

Index: src/global-handles.cc
===================================================================
--- src/global-handles.cc	(revision 15486)
+++ src/global-handles.cc	(working copy)
@@ -799,6 +799,7 @@
   PrintF("  # total      = %d\n", total);
 }
 
+
 void GlobalHandles::Print() {
   PrintF("Global handles:\n");
   for (NodeIterator it(this); !it.done(); it.Advance()) {