Build WebRTC with data channel only.

webrtc/sdk/android/BUILD.gn

 # Copyright (c) 2016 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.
 
 import("//webrtc/webrtc.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
 config("libjingle_peerconnection_jni_warnings_config") {
   # The warnings below are enabled by default. Since GN orders compiler flags
   # for a target before flags from configs, the only way to disable such
   # warnings is by having them in a separate config, loaded from the target.
   if (!is_win) {
     cflags = [
       "-Wno-sign-compare",
       "-Wno-unused-variable",
     ]
   }
 }
 
 rtc_static_library("libjingle_peerconnection_jni") {
   sources = [
     "src/jni/androidhistogram_jni.cc",
     "src/jni/androidmediacodeccommon.h",
-    "src/jni/androidmediadecoder_jni.cc",
-    "src/jni/androidmediadecoder_jni.h",
-    "src/jni/androidmediaencoder_jni.cc",
-    "src/jni/androidmediaencoder_jni.h",
     "src/jni/androidnetworkmonitor_jni.cc",
     "src/jni/androidnetworkmonitor_jni.h",
     "src/jni/androidvideotracksource.cc",
     "src/jni/androidvideotracksource.h",
     "src/jni/androidvideotracksource_jni.cc",
     "src/jni/classreferenceholder.cc",
     "src/jni/classreferenceholder.h",
     "src/jni/jni_helpers.cc",
     "src/jni/jni_helpers.h",
     "src/jni/native_handle_impl.cc",
@@ skipping 20 matching lines @@
 
   if (is_win) {
     cflags += [
       "/wd4245",  # conversion from "int" to "size_t", signed/unsigned mismatch.
       "/wd4389",  # signed/unsigned mismatch.
     ]
   }
 
   deps = [
     "../..:webrtc_common",
-    "../../api:video_frame_api",
     "../../api/video_codecs:video_codecs_api",
     "../../base:rtc_base",
     "../../base:rtc_base_approved",
     "../../base:rtc_task_queue",
-    "../../common_video:common_video",
     "../../media:rtc_media",
     "../../media:rtc_media_base",
     "../../modules/utility:utility",
-    "../../modules/video_coding:video_coding_utility",
     "../../system_wrappers:system_wrappers",
-    "../../voice_engine:voice_engine",
     "//webrtc/pc:libjingle_peerconnection",
   ]
 
   if (rtc_build_libyuv) {
     deps += [ "$rtc_libyuv_dir" ]
     public_deps = [
       "$rtc_libyuv_dir",
     ]
   } else {
     # Need to add a directory normally exported by libyuv.
     include_dirs = [ "$rtc_libyuv_dir/include" ]
   }
+
+  if (rtc_enable_media) {
+    sources += [
+      "src/jni/androidmediadecoder_jni.cc",
+      "src/jni/androidmediadecoder_jni.h",
+      "src/jni/androidmediaencoder_jni.cc",
+      "src/jni/androidmediaencoder_jni.h",
+    ]
+
+    deps += [
+      "../../api:video_frame_api",
+      "../../common_video:common_video",
+      "../../modules/video_coding:video_coding_utility",
+      "../../voice_engine:voice_engine",
+    ]
+  }
 }
 
 rtc_static_library("libjingle_peerconnection_metrics_default_jni") {
   sources = [
     "src/jni/androidmetrics_jni.cc",
   ]
 
   configs += [ ":libjingle_peerconnection_jni_warnings_config" ]
 
   deps = [
@@ skipping 145 matching lines @@
       "//third_party/android_support_test_runner:runner_java",
       "//third_party/junit",
       "//webrtc/base:base_java",
       "//webrtc/sdk/android:libjingle_peerconnection_java",
       "//webrtc/sdk/android:libjingle_peerconnection_metrics_default_java",
     ]
 
     shared_libraries = [ "//webrtc/sdk/android:libjingle_peerconnection_so" ]
   }
 }