Remove unused files linux.cc/.h and linuxfdwalk.c/.h.

webrtc/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # TODO(kjellander): Rebase this to webrtc/build/common.gypi changes after r6330.
 
@@ skipping 450 matching lines @@
       "p2p/base/transportcontroller_unittest.cc",
       "p2p/base/transportdescriptionfactory_unittest.cc",
       "p2p/base/turnport_unittest.cc",
       "p2p/base/turnserver_unittest.cc",
       "p2p/base/udptransportchannel_unittest.cc",
       "p2p/client/basicportallocator_unittest.cc",
       "p2p/stunprober/stunprober_unittest.cc",
     ]
 
     if (is_linux) {
-      sources += [
-        "base/latebindingsymboltable_unittest.cc",
-
-        # TODO(ronghuawu): Reenable this test.
-        # "linux_unittest.cc",
-        "base/linuxfdwalk_unittest.cc",
-      ]
+      sources += [ "base/latebindingsymboltable_unittest.cc" ]
     }
 
     if (is_win) {
       sources += [
         "base/win32_unittest.cc",
         "base/win32regkey_unittest.cc",
         "base/win32window_unittest.cc",
       ]
     }
 
@@ skipping 225 matching lines @@
 
       deps = [
         "//base:base_java_test_support",
         "//webrtc/api:libjingle_peerconnection_java",
         "//webrtc/api:libjingle_peerconnection_jni",
         "//webrtc/examples:AppRTCMobile_javalib",
       ]
     }
   }
 }