Restructure contents of blimp/client.

blimp/client/linux/blimp_main.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 <X11/Xlib.h>
-
-#include <string>
-
-#include "base/at_exit.h"
-#include "base/command_line.h"
-#include "base/run_loop.h"
-#include "base/threading/thread.h"
-#include "blimp/client/blimp_startup.h"
-#include "blimp/client/session/blimp_client_session_linux.h"
-#include "blimp/client/session/navigation_feature.h"
-#include "blimp/client/session/tab_control_feature.h"
-
-namespace {
-const char kDefaultUrl[] = "https://www.google.com";
-const int kDummyTabId = 0;
-}
-
-int main(int argc, const char**argv) {
-  base::AtExitManager at_exit;
-  base::CommandLine::Init(argc, argv);
-
-  XInitThreads();
-
-  blimp::client::InitializeLogging();
-  blimp::client::InitializeMainMessageLoop();
-
-  blimp::client::BlimpClientSessionLinux session;
-  session.GetTabControlFeature()->CreateTab(kDummyTabId);
-
-  // If there is a non-switch argument to the command line, load that url.
-  base::CommandLine::StringVector args =
-      base::CommandLine::ForCurrentProcess()->GetArgs();
-  std::string url = args.size() > 0 ? args[0] : kDefaultUrl;
-  session.GetNavigationFeature()->NavigateToUrlText(kDummyTabId, url);
-
-  base::RunLoop().Run();
-}