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

chrome/browser/safe_browsing/local_two_phase_testserver.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_LOCAL_TWO_PHASE_TESTSERVER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_LOCAL_TWO_PHASE_TESTSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "net/test/spawned_test_server/local_test_server.h"
 
+namespace safe_browsing {
+
 // Runs a Python-based two phase upload test server on the same machine in which
 // the LocalTwoPhaseTestServer runs.
 class LocalTwoPhaseTestServer : public net::LocalTestServer {
  public:
   // Initialize a two phase protocol test server.
   LocalTwoPhaseTestServer();
 
   ~LocalTwoPhaseTestServer() override;
 
   // Returns the path to two_phase_testserver.py.
   bool GetTestServerPath(base::FilePath* testserver_path) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LocalTwoPhaseTestServer);
 };
 
+}  // namespace safe_browsing
+
 #endif  // CHROME_BROWSER_SAFE_BROWSING_LOCAL_TWO_PHASE_TESTSERVER_H_