Move code in components/safe_browsing_db and chrome/browser/s_b/ under the safe_browsing namespace.

chrome/browser/safe_browsing/test_database_manager.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/test_database_manager.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 
+namespace safe_browsing {
+
 bool TestSafeBrowsingDatabaseManager::IsSupported() const {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool TestSafeBrowsingDatabaseManager::ChecksAreAlwaysAsync() const {
   NOTIMPLEMENTED();
   return false;
 }
 
@@ skipping 74 matching lines @@
 
 void TestSafeBrowsingDatabaseManager::CancelCheck(Client* client) {
   NOTIMPLEMENTED();
 }
 
 void TestSafeBrowsingDatabaseManager::StartOnIOThread() {
 }
 
 void TestSafeBrowsingDatabaseManager::StopOnIOThread(bool shutdown) {
 }
+
+}  // namespace safe_browsing