Move gtest_prod_util.h out of webrtc/test tree.

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 228 matching lines @@
   configs += [ ":common_config" ]
   public_configs = [ ":common_inherited_config" ]
 
   if (is_clang && !is_nacl) {
     # Suppress warnings from Chrome's Clang plugins.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
     configs -= [ "//build/config/clang:find_bad_constructs" ]
   }
 }
 
-source_set("gtest_prod") {
-  sources = [
-    "test/testsupport/gtest_prod_util.h",
-  ]
-}
-
 if (rtc_enable_protobuf) {
   proto_library("rtc_event_log_proto") {
     sources = [
       "call/rtc_event_log.proto",
     ]
     proto_out_dir = "webrtc/call"
   }
 }
 
 source_set("rtc_event_log") {
@@ skipping 24 matching lines @@
 if (use_libfuzzer || use_drfuzz) {
   # This target is only here for gn to discover fuzzer build targets under
   # webrtc/test/fuzzers/.
   group("webrtc_fuzzers_dummy") {
     testonly = true
     deps = [
       "test/fuzzers:webrtc_fuzzer_main",
     ]
   }
 }