Mark UUID::GetByteSize() const

[sas]

Summary

This method doesn't modify anything in the object it's called on so we
can mark it const to make it usable in a const context.

include/lldb/Utility/UUID.h

public:
   const UUID &operator=(const UUID &rhs);
 
   void Clear();
 
   void Dump(Stream *s) const;
 
   const void *GetBytes() const;
 
-  size_t GetByteSize();
+  size_t GetByteSize() const;
 
   bool IsValid() const;
 
   bool SetBytes(const void *uuid_bytes, uint32_t num_uuid_bytes = 16);
 
   std::string GetAsString(const char *separator = nullptr) const;
 
   size_t SetFromStringRef(llvm::StringRef str, uint32_t num_uuid_bytes = 16);

source/Utility/UUID.cpp

if (m_num_uuid_bytes > 0) {
       ::memcpy(m_uuid, uuid_bytes, m_num_uuid_bytes);
       return true;
     }
   }
   ::memset(m_uuid, 0, sizeof(m_uuid));
   return false;
 }
 
-size_t UUID::GetByteSize() { return m_num_uuid_bytes; }
+size_t UUID::GetByteSize() const { return m_num_uuid_bytes; }
 
 bool UUID::IsValid() const {
   return m_uuid[0] || m_uuid[1] || m_uuid[2] || m_uuid[3] || m_uuid[4] ||
          m_uuid[5] || m_uuid[6] || m_uuid[7] || m_uuid[8] || m_uuid[9] ||
          m_uuid[10] || m_uuid[11] || m_uuid[12] || m_uuid[13] || m_uuid[14] ||
          m_uuid[15] || m_uuid[16] || m_uuid[17] || m_uuid[18] || m_uuid[19];
 }