Putting histogram names of tracked prefs in tracked_preference_histogram_name file.

components/user_prefs/tracked/tracked_preference_histogram_names.h

Index: components/user_prefs/tracked/tracked_preference_histogram_names.h
diff --git a/components/user_prefs/tracked/tracked_preference_histogram_names.h b/components/user_prefs/tracked/tracked_preference_histogram_names.h
new file mode 100644
index 0000000000000000000000000000000000000000..05de0012bded2586782d1b60f358c421bb8f556f
--- /dev/null
+++ b/components/user_prefs/tracked/tracked_preference_histogram_names.h
@@ -0,0 +1,26 @@
+// Copyright 2015 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 COMPONENTS_TRACKED_PREFERENCE_HISTOGRAM_NAMES_H_

[Bernhard Bauer, 2015/12/14 17:32:36]

This header guard isn't correct. Shouldn't there have been a presubmit check
warning about this? If there wasn't, please check that your checkout is
correctly set up.

[Deepak, 2015/12/15 04:39:36]

Done.

+#define COMPONENTS_TRACKED_PREFERENCE_HISTOGRAM_NAMES_H_
+
+namespace user_prefs {
+

[gab, 2015/12/14 19:29:27]

no empty line between consecutive nested namespaces (same at bottom when closing
and in .cc)

[Deepak, 2015/12/15 04:39:36]

Done.

+namespace tracked {
+
+extern const char kTrackedPrefHistogramUnchanged[];
+extern const char kTrackedPrefHistogramCleared[];
+extern const char kTrackedPrefHistogramMigratedLegacyDeviceId[];
+extern const char kTrackedPrefHistogramChanged[];
+extern const char kTrackedPrefHistogramInitialized[];
+extern const char kTrackedPrefHistogramTrustedInitialized[];
+extern const char kTrackedPrefHistogramNullInitialized[];
+extern const char kTrackedPrefHistogramWantedReset[];
+extern const char kTrackedPrefHistogramReset[];
+extern const char kTrackedSplitPrefHistogramChanged[];
+}

[Bernhard Bauer, 2015/12/14 17:32:37]

Empty line before this to match the opening namespace declaration. Also, add a
comment // namespace tracked.

[Deepak, 2015/12/15 04:39:36]

Done.

+
+}  // namespace tracked_pref_histogram_names

[Bernhard Bauer, 2015/12/14 17:32:37]

namespace user_prefs

[Deepak, 2015/12/15 04:39:36]

Done.

+
+#endif  // COMPONENTS_TRACKED_PREFERENCE_HISTOGRAM_NAMES_H_