Move pre_read_field_trial_utils.h/cc to common/.

components/startup_metric_utils/common/pre_read_field_trial_utils_win.cc

Index: components/startup_metric_utils/common/pre_read_field_trial_utils_win.cc
diff --git a/components/startup_metric_utils/browser/pre_read_field_trial_utils_win.cc b/components/startup_metric_utils/common/pre_read_field_trial_utils_win.cc
similarity index 98%
rename from components/startup_metric_utils/browser/pre_read_field_trial_utils_win.cc
rename to components/startup_metric_utils/common/pre_read_field_trial_utils_win.cc
index d3de8c1b75685158aedaf101541c468bdd8db58b..6aa82a19d93e59d8da9f80ca767206fe5f438be6 100644
--- a/components/startup_metric_utils/browser/pre_read_field_trial_utils_win.cc
+++ b/components/startup_metric_utils/common/pre_read_field_trial_utils_win.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/startup_metric_utils/browser/pre_read_field_trial_utils_win.h"
+#include "components/startup_metric_utils/common/pre_read_field_trial_utils_win.h"
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"