Introduces Android API level linting, fixes all current API lint errors.

talk/libjingle.gyp

 #
 # libjingle
 # Copyright 2012 Google Inc.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
 #
 #  1. Redistributions of source code must retain the above copyright notice,
 #     this list of conditions and the following disclaimer.
 #  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 209 matching lines @@
           # It includes all Java files needed to setup a PeeerConnection call
           # from Android.
           # TODO(perkj): Consider replacing the use of
           # libjingle_peerconnection_jar with this target everywhere.
           'target_name': 'libjingle_peerconnection_java',
           'type': 'none',
           'dependencies': [
             'libjingle_peerconnection_so',
           ],
           'variables': {
+            # Designate as Chromium code and point to our lint settings to
+            # enable linting of the WebRTC code (this is the only way to make
+            # lint_action invoke the Android linter).
+            'android_manifest_path': 'app/webrtc/java/lint/AndroidManifest.xml',
+            'suppressions_file': 'app/webrtc/java/lint/suppressions.xml',
+            'chromium_code': 1,

[kjellander_webrtc, 2015/11/12 13:02:18]

I'd like us to do this for more Android Java targets in WebRTC, but that can be
done in a follow-up CL.

[phoglund, 2015/11/12 13:21:34]

This covers all our java production code I think, but yeah, if we find more
targets we can sure add those.

             'java_in_dir': 'app/webrtc/java',
             'webrtc_base_dir': '<(webrtc_root)/base',
             'webrtc_modules_dir': '<(webrtc_root)/modules',
             'additional_src_dirs' : [
               'app/webrtc/java/android',
               '<(webrtc_base_dir)/java/src',
               '<(webrtc_modules_dir)/audio_device/android/java/src',
               '<(webrtc_modules_dir)/video_render/android/java/src',
             ],
           },
@@ skipping 548 matching lines @@
         ['OS=="android" and build_with_chromium==0', {
           'sources': [
             'app/webrtc/androidvideocapturer.h',
             'app/webrtc/androidvideocapturer.cc',
            ],
         }],
       ],
     },  # target libjingle_peerconnection
   ],
 }