Add MachOImageReader and its test

util/misc/uuid.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 23 matching lines @@
                UUID_must_be_standard_layout);
 #endif
 
 UUID::UUID() : data_1(0), data_2(0), data_3(0), data_4(), data_5() {
 }
 
 UUID::UUID(const uint8_t* bytes) {
   InitializeFromBytes(bytes);
 }
 
+bool UUID::operator==(const UUID& that) const {
+  return memcmp(this, &that, sizeof(UUID)) == 0;
+}
+
 void UUID::InitializeFromBytes(const uint8_t* bytes) {
   memcpy(this, bytes, sizeof(*this));
   data_1 = base::NetToHost32(data_1);
   data_2 = base::NetToHost16(data_2);
   data_3 = base::NetToHost16(data_3);
 }
 
 std::string UUID::ToString() const {
   return base::StringPrintf("%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
                             data_1,
                             data_2,
                             data_3,
                             data_4[0],
                             data_4[1],
                             data_5[0],
                             data_5[1],
                             data_5[2],
                             data_5[3],
                             data_5[4],
                             data_5[5]);
 }
 
 }  // namespace crashpad