Reland of Moving webrtc.gni up one level from build/

webrtc/modules/utility/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.
 
-import("../../build/webrtc.gni")
+import("../../webrtc.gni")
 
 rtc_static_library("utility") {
   sources = [
     "include/audio_frame_operations.h",
     "include/helpers_android.h",
     "include/jvm_android.h",
     "include/process_thread.h",
     "source/helpers_android.cc",
     "source/jvm_android.cc",
     "source/process_thread_impl.cc",
@@ skipping 30 matching lines @@
       "source/process_thread_impl_unittest.cc",
     ]
     deps = [
       ":utility",
       "../../base:rtc_task_queue",
       "../../test:test_support",
       "//testing/gmock",
     ]
   }
 }