CloseBackgroundHost  577 extensions/browser/process_manager.cc       CloseBackgroundHost(host);
CloseBackgroundHost  672 extensions/browser/process_manager.cc           CloseBackgroundHost(host);
CloseBackgroundHost  693 extensions/browser/process_manager.cc         CloseBackgroundHost(host);
CloseBackgroundHost  189 extensions/browser/process_manager.h   void CloseBackgroundHost(ExtensionHost* host);