Implement LoadLog, and hook up HostResolverImpl to LoadLog....

net/base/load_log_unittest.h

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_BASE_LOAD_LOG_UNITTEST_H_
+#define NET_BASE_LOAD_LOG_UNITTEST_H_
+
+#include "net/base/load_log.h"
+
+namespace net {
+
+// Create a timestamp with internal value of |t| milliseconds from the epoch.
+base::TimeTicks MakeTime(int t);
+
+// Call gtest's EXPECT_* to verify that |log| contains the specified entry
+// at index |i|.
+void ExpectLogContains(const LoadLog* log,
+                       size_t i,
+                       base::TimeTicks expected_time,
+                       LoadLog::EventType expected_event,
+                       LoadLog::EventPhase expected_phase);
+
+// Same as above, but without an expectation for the timestamp.
+void ExpectLogContains(const LoadLog* log,
+                       size_t i,
+                       LoadLog::EventType expected_event,
+                       LoadLog::EventPhase expected_phase);
+
+}  // namespace net
+
+#endif  // NET_BASE_LOAD_LOG_UNITTEST_H_