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

components/sync/driver/sync_stopped_reporter_unittest.cc

Index: components/sync/driver/sync_stopped_reporter_unittest.cc
diff --git a/components/sync/driver/sync_stopped_reporter_unittest.cc b/components/sync/driver/sync_stopped_reporter_unittest.cc
index 501c2b7c36c95d89009edf1838c6ba8e04e57026..51490e4af4aa399bb7fda944338e9ac10d5859a3 100644
--- a/components/sync/driver/sync_stopped_reporter_unittest.cc
+++ b/components/sync/driver/sync_stopped_reporter_unittest.cc
@@ -18,7 +18,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
-using browser_sync::SyncStoppedReporter;
+namespace syncer {
 
 const char kTestURL[] = "http://chromium.org/test";
 const char kTestURLTrailingSlash[] = "http://chromium.org/test/";
@@ -202,3 +202,5 @@ TEST_F(SyncStoppedReporterTest, NoCallbackTimeout) {
   ASSERT_TRUE(task_runner->HasPendingTask());
   task_runner->RunPendingTasks();
 }
+
+}  // namespace syncer