Move MetricsStateManager into the Metrics component.

components/metrics/metrics_pref_names.h

Index: components/metrics/metrics_pref_names.h
diff --git a/components/metrics/metrics_pref_names.h b/components/metrics/metrics_pref_names.h
index 4c799c7d5f26e7cb3bb3a7021dbaaeb95a3ea35b..ea03ec20057e59dc250d59e84ffae296b0917289 100644
--- a/components/metrics/metrics_pref_names.h
+++ b/components/metrics/metrics_pref_names.h
@@ -9,7 +9,14 @@ namespace metrics {
 namespace prefs {
 
 // Alphabetical list of preference names specific to the metrics
-// component. Keep alphabetized, and document each in the .cc file.
+// component. Document each in the .cc file.

[Alexei Svitkine (slow), 2014/06/02 20:35:43]

Not keeping them alphabetical is fine, but let's group them in sections based on
what things use them.

e.g.

// MetricsStateManager prefs:

[blundell, 2014/06/02 20:43:41]

I actually prefer having them be alphabetical (as I've generally seen them). I
kept these ones in the groupings they were in previously. Is it OK if I change
them to be alphabetical?

[Alexei Svitkine (slow), 2014/06/02 20:51:44]

Sure. I don't think the grouping is super important here.

[blundell, 2014/06/03 15:46:48]

Done.

+extern const char kMetricsClientID[];
+extern const char kMetricsSessionID[];
+extern const char kMetricsLowEntropySource[];
+extern const char kMetricsOldClientID[];
+extern const char kMetricsOldLowEntropySource[];
+extern const char kMetricsReportingEnabled[];
+extern const char kMetricsReportingEnabledTimestamp[];
 extern const char kMetricsInitialLogs[];
 extern const char kMetricsMachineId[];
 extern const char kMetricsOngoingLogs[];