Rebuild test history databases when starting up performance_ui_tests.

chrome/test/perf/generate_profile.h

+// Copyright (c) 2013 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 CHROME_TEST_PERF_GENERATE_PROFILE_H_
+#define CHROME_TEST_PERF_GENERATE_PROFILE_H_
+
+namespace base {
+class FilePath;
+}
+
+// Addition types data can be generated for. By default only urls/visits are
+// added.
+enum GenerateProfileTypes {
+  TOP_SITES = 1 << 0,
+  FULL_TEXT = 1 << 1
+};
+
+// Generates a user profile and history by psuedo-randomly generating data and
+// feeding it to the history service. (srand is initialized with whatever
+// urlcount is before profile is generated for deterministic output; it is
+// reset to time() afterwards.) Returns true if successful.
+bool GenerateProfile(GenerateProfileTypes types,
+                     int urlcount,
+                     const base::FilePath& dst_dir);

[Paweł Hajdan Jr., 2013/05/06 23:46:04]

nit: Add WARN_UNUSED_RESULT from base/compiler_specific.

+
+#endif  // CHROME_TEST_PERF_GENERATE_PROFILE_H_