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

webrtc/p2p/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.gni")
+import("../build/webrtc.gni")
 
 group("p2p") {
   public_deps = [
     ":libstunprober",
     ":rtc_p2p",
   ]
 }
 
 config("rtc_p2p_inherited_config") {
   defines = [ "FEATURE_ENABLE_VOICEMAIL" ]
@@ skipping 200 matching lines @@
       "//testing/gmock",
       "//testing/gtest",
     ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
     defines = [ "GTEST_RELATIVE_PATH" ]
   }
 }