Remove dependency on PAM from the It2Me host

remoting/host/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//remoting/remoting_version.gni")
 
 static_library("host") {
   gypi_values = exec_script("//build/gypi_to_gn.py",
@@ skipping 16 matching lines @@
     "//crypto",
     "//google_apis",
     "//ipc",
     "//remoting/base",
     "//remoting/protocol",
     "//remoting/resources",
     "//ui/events/platform",
     "//ui/events:dom4_keycode_converter",
   ]
 
-  if (is_linux) {
+  if (is_linux && !is_chromeos) {
     libs += [ "pam" ]
   }
 
   if (use_x11) {
     configs += [
-      #TODO : (kelvinp) Add GTK to the configs.
+      # TODO(kelvinp): Add GTK to the configs.
       "//build/config/linux:x11",
     ]
   } else {
     sources -= [
       "clipboard_x11.cc",
       "linux/x_server_clipboard.cc",
       "linux/x_server_clipboard.h",
     ]
   }
 
@@ skipping 22 matching lines @@
         "input_injector_chromeos.h",
         "linux/x_server_clipboard.cc",
         "linux/x_server_clipboard.h",
       ]
     }
 
     sources -= [
       "continue_window_linux.cc",
       "disconnect_window_linux.cc",
       "local_input_monitor_x11.cc",
-      "remoting_me2me_host.cc",
     ]
   }
 
   if (is_mac) {
     defines += [
       "HOST_BUNDLE_NAME=\"$host_bundle_name\"",
       "PREFPANE_BUNDLE_NAME=\"$prefpane_bundle_name\"",
     ]
 
     libs += [
       "Accelerate.framework",
       "libpam.a",
     ]
 
     deps += [ "//google_toolbox_for_mac" ]
   }
 
   if (enable_webrtc) {
     deps += [
       "//third_party/libjingle:libpeerconnection",
       "//third_party/webrtc/modules/desktop_capture",
     ]
 
     sources += rebase_path(gypi_values.remoting_cast_sources, ".", "//remoting")
   }
 }