EDK: Remove (direct) dependencies of //mojo/edk/system on //base/test.

mojo/edk/system/test/perf_log.h

+// Copyright 2015 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.
+
+// Functions for logging perf test results.
+
+#ifndef MOJO_EDK_SYSTEM_TEST_PERF_LOG_H_
+#define MOJO_EDK_SYSTEM_TEST_PERF_LOG_H_
+
+//#include "mojo/public/c/system/types.h"
+//#include "mojo/public/cpp/system/macros.h"
+
+namespace mojo {
+namespace system {
+namespace test {
+
+// TODO(vtl): Possibly should have our own "InitPerfLog()" and
+// "FinalizePerfLog()" functions, but we can't do that until we stop using
+// |base::PerfTestSuite()|. Currently,
+
+// Logs the result of a perf test. You may only call this while running inside a
+// perf test suite (using the :run_all_perftests from this directory).
+void LogPerfResult(const char* test_name, double value, const char* units);
+
+}  // namespace test
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_EDK_SYSTEM_TEST_PERF_LOG_H_