Add UUID, strlcpy, and their tests to util

util/stdlib/strlcpy.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,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "util/stdlib/strlcpy.h"
+
+namespace crashpad {
+
+size_t c16lcpy(char16* destination, const char16* source, size_t length) {
+  size_t source_length = base::c16len(source);
+  if (source_length < length) {
+    base::c16memcpy(destination, source, source_length + 1);
+  } else if (length != 0) {
+    base::c16memcpy(destination, source, length - 1);
+    destination[length - 1] = '\0';
+  }
+  return source_length;
+}
+
+}  // namespace crashpad