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diff --git a/chromium/chrome/renderer/safe_browsing/feature_extractor_clock.h b/chromium/chrome/renderer/safe_browsing/feature_extractor_clock.h
new file mode 100644
index 00000000000..930c1a4b7ab
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+++ b/chromium/chrome/renderer/safe_browsing/feature_extractor_clock.h
@@ -0,0 +1,30 @@
+// Copyright (c) 2010 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.
+//
+// A simple abstraction for getting the current time during feature extraction.
+// This can be mocked out for testing.
+
+#ifndef CHROME_RENDERER_SAFE_BROWSING_FEATURE_EXTRACTOR_CLOCK_H_
+#define CHROME_RENDERER_SAFE_BROWSING_FEATURE_EXTRACTOR_CLOCK_H_
+
+#include "base/macros.h"
+#include "base/time/time.h"
+
+namespace safe_browsing {
+
+class FeatureExtractorClock {
+ public:
+  FeatureExtractorClock() {}
+  virtual ~FeatureExtractorClock();
+
+  // Returns the current time.  May be mocked for testing.
+  virtual base::TimeTicks Now();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FeatureExtractorClock);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_RENDERER_SAFE_BROWSING_FEATURE_EXTRACTOR_CLOCK_H_