Keep two empty lines between declarations for cpp files

src/heap-profiler.cc

 // Copyright 2009-2010 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 76 matching lines @@
 }
 
 
 HeapSnapshot* HeapProfiler::TakeSnapshot(
     String* name,
     v8::ActivityControl* control,
     v8::HeapProfiler::ObjectNameResolver* resolver) {
   return TakeSnapshot(snapshots_->names()->GetName(name), control, resolver);
 }
 
+
 void HeapProfiler::StartHeapObjectsTracking() {
   snapshots_->StartHeapObjectsTracking();
 }
 
 
 SnapshotObjectId HeapProfiler::PushHeapObjectsStats(OutputStream* stream) {
   return snapshots_->PushHeapObjectsStats(stream);
 }
 
 
@@ skipping 33 matching lines @@
   snapshots_->ObjectMoveEvent(from, to);
 }
 
 void HeapProfiler::SetRetainedObjectInfo(UniqueId id,
                                          RetainedObjectInfo* info) {
   // TODO(yurus, marja): Don't route this information through GlobalHandles.
   heap()->isolate()->global_handles()->SetRetainedObjectInfo(id, info);
 }
 
 } }  // namespace v8::internal