[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/sync_sessions_metrics_unittest.cc

 // Copyright 2016 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.
 
 #include "components/sync_sessions/sync_sessions_metrics.h"
 
 #include <algorithm>
+#include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/test/histogram_tester.h"
 #include "base/time/time.h"
 #include "components/sessions/core/session_types.h"
 #include "components/sync_sessions/fake_sync_sessions_client.h"
 #include "components/sync_sessions/sessions_sync_manager.h"
 #include "components/sync_sessions/synced_session.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using sync_driver::SyncedSession;
 using sessions::SessionWindow;
 using sessions::SessionTab;
 using base::Time;
 using base::TimeDelta;
 
 namespace sync_sessions {
 
 namespace {
 
-class FakeSessionsSyncManager : public browser_sync::SessionsSyncManager {
+class FakeSessionsSyncManager : public SessionsSyncManager {
  public:
   FakeSessionsSyncManager(SyncSessionsClient* sessions_client,
                           std::vector<std::unique_ptr<SyncedSession>>* sessions)
-      : browser_sync::SessionsSyncManager(sessions_client,
-                                          nullptr,
-                                          nullptr,
-                                          nullptr,
-                                          base::Closure(),
-                                          base::Closure()),
+      : SessionsSyncManager(sessions_client,
+                            nullptr,
+                            nullptr,
+                            nullptr,
+                            base::Closure(),
+                            base::Closure()),
         sessions_(sessions) {}
 
   bool GetAllForeignSessions(
-      std::vector<const sync_driver::SyncedSession*>* sessions) override {
+      std::vector<const SyncedSession*>* sessions) override {
     for (auto& session : *sessions_) {
       sessions->push_back(session.get());
     }
     return true;
   }
 
  private:
   std::vector<std::unique_ptr<SyncedSession>>* sessions_;
 };
 
@@ skipping 43 matching lines @@
 
   // Runs MaxTabTimestamp on the current sessions data.
   Time MaxTabTimestamp() {
     std::vector<const SyncedSession*> typed_sessions;
     for (auto& session : sessions_) {
       typed_sessions.push_back(session.get());
     }
     return SyncSessionsMetrics::MaxTabTimestamp(typed_sessions);
   }
 
-  browser_sync::SessionsSyncManager* get_sessions_sync_manager() {
-    return &fake_manager_;
-  }
+  SessionsSyncManager* get_sessions_sync_manager() { return &fake_manager_; }
 
  private:
   std::vector<std::unique_ptr<SyncedSession>> sessions_;
   FakeSyncSessionsClient fake_client_;
   FakeSessionsSyncManager fake_manager_;
 };
 
 TEST_F(SyncSessionsMetricsTest, NoWindows) {
   ASSERT_EQ(Time::UnixEpoch(), MaxTabTimestamp());
 }
@@ skipping 78 matching lines @@
 
 TEST_F(SyncSessionsMetricsTest, EmitNormalCase) {
   base::HistogramTester histogram_tester;
   PushTab(0, 0, Time::Now() - TimeDelta::FromHours(1));
   SyncSessionsMetrics::RecordYoungestForeignTabAgeOnNTP(
       get_sessions_sync_manager());
   histogram_tester.ExpectTotalCount("Sync.YoungestForeignTabAgeOnNTP", 1);
 }
 
 }  // namespace sync_sessions