Use LockFile/UnlockFile for Settings to port to Windows

util/misc/uuid.cc

Index: util/misc/uuid.cc
diff --git a/util/misc/uuid.cc b/util/misc/uuid.cc
index 904efcd339838d7b8a9d0e2f456ccfc49d5ffe6e..4b8417ae6989edd9b1dd287f70bad4a829be378e 100644
--- a/util/misc/uuid.cc
+++ b/util/misc/uuid.cc
@@ -23,11 +23,16 @@
 #include <string.h>
 
 #include "base/basictypes.h"
+#include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_byteorder.h"
 #include "util/stdlib/cxx.h"
 
+#if defined(OS_MACOSX)
+#include <uuid/uuid.h>
+#endif  // OS_MACOSX
+
 #if CXX_LIBRARY_VERSION >= 2011
 #include <type_traits>
 #endif
@@ -119,4 +124,22 @@ base::string16 UUID::ToString16() const {
 }
 #endif  // OS_WIN
 
+// static
+bool UUID::GenerateFromSystem(UUID* into) {
+#if defined(OS_MACOSX)
+  uuid_t uuid;
+  uuid_generate(uuid);
+  into->InitializeFromBytes(uuid);
+  return true;
+#elif defined(OS_WIN)
+  ::UUID system_uuid;
+  if (UuidCreate(&system_uuid) != RPC_S_OK) {
+    LOG(ERROR) << "UuidCreate";
+    return false;
+  }
+  into->InitializeFromSystemUUID(&system_uuid);
+  return true;
+#endif  // OS_MACOSX
+}
+
 }  // namespace crashpad