[Blimp client] Move client code into blimp::client namespace

blimp/client/session/blimp_client_session_linux.h

 // 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.
 
 #ifndef BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_
 #define BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_
 
 #include "base/macros.h"
 #include "blimp/client/linux/blimp_display_manager.h"
 #include "blimp/client/session/blimp_client_session.h"
 
 namespace ui {
 class PlatformEventSource;
 }
 
 namespace blimp {
+namespace client {
 
 class BlimpClientSessionLinux : public BlimpClientSession,
                                 public BlimpDisplayManagerDelegate {
  public:
   BlimpClientSessionLinux();
   ~BlimpClientSessionLinux() override;
 
   // BlimpDisplayManagerDelegate implementation.
   void OnClosed() override;
 
  private:
   scoped_ptr<ui::PlatformEventSource> event_source_;
   scoped_ptr<BlimpDisplayManager> blimp_display_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpClientSessionLinux);
 };
 
+}  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_