[Sync] Move //components/sync to the syncer namespace.

components/sync/device_info/device_count_metrics_provider.h

Index: components/sync/device_info/device_count_metrics_provider.h
diff --git a/components/sync/device_info/device_count_metrics_provider.h b/components/sync/device_info/device_count_metrics_provider.h
index 8c1bc2f268ddfd5c7418d50975caf9e84b7c3980..dcd845284e358da0790cff97f8ba198c57219241 100644
--- a/components/sync/device_info/device_count_metrics_provider.h
+++ b/components/sync/device_info/device_count_metrics_provider.h
@@ -12,7 +12,7 @@
 #include "base/macros.h"
 #include "components/metrics/metrics_provider.h"
 
-namespace sync_driver {
+namespace syncer {
 
 class DeviceInfoTracker;
 
@@ -27,8 +27,7 @@ class DeviceInfoTracker;
 // would be much trickier.
 class DeviceCountMetricsProvider : public metrics::MetricsProvider {
  public:
-  typedef base::Callback<void(
-      std::vector<const sync_driver::DeviceInfoTracker*>* trackers)>
+  typedef base::Callback<void(std::vector<const DeviceInfoTracker*>* trackers)>
       ProvideTrackersCallback;
 
   explicit DeviceCountMetricsProvider(
@@ -48,6 +47,6 @@ class DeviceCountMetricsProvider : public metrics::MetricsProvider {
   DISALLOW_COPY_AND_ASSIGN(DeviceCountMetricsProvider);
 };
 
-}  // namespace sync_driver
+}  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DEVICE_INFO_DEVICE_COUNT_METRICS_PROVIDER_H_