GetRef            117 base/memory/weak_ptr.h   WeakReference GetRef() const;
GetRef            270 base/memory/weak_ptr.h     return WeakPtr<T>(weak_reference_owner_.GetRef(), ptr_);
GetRef            302 base/memory/weak_ptr.h     return WeakPtr<T>(weak_reference_owner_.GetRef(), static_cast<T*>(this));