Keep two empty lines between declarations for cpp files

test/cctest/test-log-stack-tracer.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 168 matching lines @@
 
 static TraceExtension kTraceExtension;
 v8::DeclareExtension kTraceExtensionDeclaration(&kTraceExtension);
 
 
 static bool IsAddressWithinFuncCode(JSFunction* function, Address addr) {
   i::Code* code = function->code();
   return code->contains(addr);
 }
 
+
 static bool IsAddressWithinFuncCode(const char* func_name, Address addr) {
   v8::Local<v8::Value> func = CcTest::env()->Global()->Get(v8_str(func_name));
   CHECK(func->IsFunction());
   JSFunction* js_func = JSFunction::cast(*v8::Utils::OpenHandle(*func));
   return IsAddressWithinFuncCode(js_func, addr);
 }
 
 
 // This C++ function is called as a constructor, to grab the frame pointer
 // from the calling function.  When this function runs, the stack contains
@@ skipping 189 matching lines @@
   CcTest::InitializeVM(TRACE_EXTENSION);
   v8::HandleScope scope(CcTest::isolate());
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("a = 1; b = a + 1;");
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("js_entry_sp();");
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("js_entry_sp_level2();");
   CHECK_EQ(0, GetJsEntrySp());
 }