Revert of Remove tools dir from root webrtc target

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 249 matching lines @@
     deps = [
       ":webrtc_common",
       "audio",
       "base:rtc_base",
       "call",
       "common_audio",
       "common_video",
       "modules",
       "stats",
       "system_wrappers",
+      "tools",
       "video",
       "voice_engine",
     ]
 
     if (build_with_chromium) {
       deps += [ "modules/video_capture" ]
     } else {
       # TODO(kjellander): Enable for Chromium as well when bugs.webrtc.org/4256
       # is fixed. Right now it's not possible due to circular dependencies.
       deps += [
@@ skipping 509 matching lines @@
 
       deps = [
         "//base:base_java_test_support",
         "//webrtc/api:libjingle_peerconnection_java",
         "//webrtc/api:libjingle_peerconnection_jni",
         "//webrtc/examples:AppRTCMobile_javalib",
       ]
     }
   }
 }