Moves components/metrics/chromeos to c/m/serialization/.

components/metrics/external/serialization_utils.h

Index: components/metrics/external/serialization_utils.h
diff --git a/components/metrics/chromeos/serialization_utils.h b/components/metrics/external/serialization_utils.h
similarity index 89%
rename from components/metrics/chromeos/serialization_utils.h
rename to components/metrics/external/serialization_utils.h
index 1fb27bc0c75ec852c3058b436054ec2a94933c2e..b45e3be395e59b4a69d79a9962893a954c1f49a6 100644
--- a/components/metrics/chromeos/serialization_utils.h
+++ b/components/metrics/external/serialization_utils.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_METRICS_CHROMEOS_SERIALIZATION_UTILS_H_
-#define COMPONENTS_METRICS_CHROMEOS_SERIALIZATION_UTILS_H_
+#ifndef COMPONENTS_METRICS_EXTERNAL_SERIALIZATION_UTILS_H_
+#define COMPONENTS_METRICS_EXTERNAL_SERIALIZATION_UTILS_H_
 
 #include <string>
 
@@ -45,4 +45,4 @@ static const int kMessageMaxLength = 1024;
 }  // namespace SerializationUtils
 }  // namespace metrics
 
-#endif  // COMPONENTS_METRICS_CHROMEOS_SERIALIZATION_UTILS_H_
+#endif  // COMPONENTS_METRICS_EXTERNAL_SERIALIZATION_UTILS_H_