Use the machine hostname on Linux machines for the sync session name rather than

sync/util/get_session_name.cc

 // Copyright (c) 2012 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 "sync/util/get_session_name.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/sys_info.h"
 #include "base/task_runner.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/command_line.h"
 #include "chromeos/chromeos_switches.h"
 #elif defined(OS_LINUX)
-#include "base/linux_util.h"
+#include "sync/util/get_session_name_linux.h"
 #elif defined(OS_IOS)
 #include "sync/util/get_session_name_ios.h"
 #elif defined(OS_MACOSX)
 #include "sync/util/get_session_name_mac.h"
 #elif defined(OS_WIN)
 #include "sync/util/get_session_name_win.h"
 #elif defined(OS_ANDROID)
 #include "base/android/build_info.h"
 #endif
 
@@ skipping 24 matching lines @@
   } else {
     LOG(ERROR) << "Failed to get board information";
   }
 
   // Currently, only "stumpy" type of board is considered Chromebox, and
   // anything else is Chromebook.  On these devices, session_name should look
   // like "stumpy-signed-mp-v2keys" etc. The information can be checked on
   // "CHROMEOS_RELEASE_BOARD" line in chrome://system.
   session_name = board.substr(0, 6) == "stumpy" ? "Chromebox" : "Chromebook";
 #elif defined(OS_LINUX)
-  session_name = base::GetLinuxDistro();
+  session_name = internal::GetHostname();
 #elif defined(OS_IOS)
   session_name = internal::GetComputerName();
 #elif defined(OS_MACOSX)
   session_name = internal::GetHardwareModelName();
 #elif defined(OS_WIN)
   session_name = internal::GetComputerName();
 #elif defined(OS_ANDROID)
   base::android::BuildInfo* android_build_info =
       base::android::BuildInfo::GetInstance();
   session_name = android_build_info->model();
@@ skipping 28 matching lines @@
       base::Bind(&OnSessionNameFilled,
                  done_callback,
                  base::Owned(session_name)));
 }
 
 std::string GetSessionNameSynchronouslyForTesting() {
   return GetSessionNameSynchronously();
 }
 
 }  // namespace syncer