Implement CPU feature detection for ARM Linux.

webrtc/system_wrappers/cpu_features_linux.gyp

-# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.

[kjellander_webrtc, 2016/04/04 06:09:45]

You already added a target in webrtc/system_wrappers/cpu_features_webrtc.gyp;
there's no need for this file.

[Simon Hosie, 2016/04/05 01:15:48]

Done.

 #
 # 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.
 
 {
   'conditions': [
-    ['OS=="android"', {
+    ['OS=="linux"', {
       'targets': [
         {
-          'target_name': 'cpu_features_android',
+          'target_name': 'cpu_features_linux',
           'type': 'static_library',
           'sources': [
-            'source/cpu_features_android.c',
-          ],
-          'dependencies': [
-            '../../build/android/ndk.gyp:cpu_features',
+            'source/cpu_features_linux.c',
           ],
         },
       ],
+      'dependencies': [
+        '<(webrtc_root)/common.gyp:webrtc_common',
+      ],
     }],
   ], # conditions
 }