Move function to compute the max number of threads in a TaskScheduler pool to base/.

base/task_scheduler/initialization_util.h

Index: base/task_scheduler/initialization_util.h
diff --git a/base/task_scheduler/initialization_util.h b/base/task_scheduler/initialization_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..c3bd9e7c4a3d5b56aca5ad2edf4e9b988c423981
--- /dev/null
+++ b/base/task_scheduler/initialization_util.h
@@ -0,0 +1,21 @@
+// Copyright 2016 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 BASE_TASK_SCHEDULER_INITIALIZATION_UTIL_H_
+#define BASE_TASK_SCHEDULER_INITIALIZATION_UTIL_H_
+
+#include "base/base_export.h"
+
+namespace base {
+
+// Computes a value that may be used as the maximum number of threads in a
+// TaskScheduler pool. Developers may use other methods to choose this maximum.
+BASE_EXPORT int RecommendedMaxNumberOfThreadsInPool(int min,
+                                                    int max,
+                                                    double cores_multiplier,
+                                                    int offset);
+
+}  // namespace base
+
+#endif  // BASE_TASK_SCHEDULER_INITIALIZATION_UTIL_H_