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diff --git a/webkit/glue/webkit_constants.h b/webkit/glue/webkit_constants.h
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+// Copyright (c) 2011 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 WEBKIT_GLUE_WEBKIT_CONSTANTS_H_
+#define WEBKIT_GLUE_WEBKIT_CONSTANTS_H_
+
+namespace webkit_glue {
+
+// Chromium sets the minimum interval timeout to 4ms, overriding the
+// default of 10ms.  We'd like to go lower, however there are poorly
+// coded websites out there which do create CPU-spinning loops.  Using
+// 4ms prevents the CPU from spinning too busily and provides a balance
+// between CPU spinning and the smallest possible interval timer.
+const double kForegroundTabTimerInterval = 0.004;
+
+// Provides control over the minimum timer interval for background tabs.
+const double kBackgroundTabTimerInterval = 0.004;
+
+} // namespace webkit_glue
+
+#endif  // WEBKIT_GLUE_WEBKIT_CONSTANTS_H_