WebKit LayoutTests needs more resources.

BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 947 matching lines @@
 
     if (is_mac) {
       data_deps += [ "//breakpad:dump_syms($host_toolchain)" ]
     }
 
     if (is_linux) {
       data_deps += [ "//breakpad:dump_syms($host_toolchain)" ]
     }
 
     data = [
+      "$root_build_dir/resources/inspector/",
       "//testing/scripts/common.py",
+      "//testing/scripts/run_isolated_script_test.py",
       "//testing/xvfb.py",
-      "//testing/scripts/run_isolated_script_test.py",
       "//third_party/WebKit/LayoutTests/",
       "//third_party/WebKit/PerformanceTests/",
+      "//third_party/WebKit/Source/platform/audio/resources/Composite.flac",
+      "//third_party/WebKit/Source/platform/audio/resources/Composite.wav",
       "//third_party/WebKit/Tools/Scripts/",
-      "$root_build_dir/resources/inspector/",
     ]
 
     if (is_win) {
       data += [ "//third_party/apache-win32/" ]
     }
 
     if (is_android) {
       data += [
         "//third_party/catapult/",
         "//build/android/",
@@ skipping 124 matching lines @@
   assert(target_name != "")  # Mark as used.
   sources = invoker.actual_sources
   assert(
       sources == invoker.actual_sources,
       "Do not use a platform name in your output directory (found \"$root_build_dir\"). http://crbug.com/548283")
 }
 
 assert_valid_out_dir("_unused") {
   actual_sources = [ "$root_build_dir/foo" ]
 }