Refactor fileutils.cc/h and fileutils_unittests.cc into their own targets.

webrtc/test/BUILD.gn

Index: webrtc/test/BUILD.gn
diff --git a/webrtc/test/BUILD.gn b/webrtc/test/BUILD.gn
index 1b3c05973ac7c1a17ee9e69c389e4b43893afbcb..7ba014e037df5081a75a1ab3f99caf99fcf5a145 100644
--- a/webrtc/test/BUILD.gn
+++ b/webrtc/test/BUILD.gn
@@ -104,14 +104,36 @@ rtc_source_set("test_main") {
   ]
 }
 
+rtc_source_set("fileutils") {
+  testonly = true
+  sources = [
+    "testsupport/fileutils.cc",
+    "testsupport/fileutils.h",
+  ]
+}
+
+rtc_source_set("fileutils_unittests") {

[kjellander_webrtc, 2016/12/02 14:40:40]

Please move to below test_support_unittests

+  testonly = true
+  sources = [
+    "testsupport/fileutils_unittest.cc",
+  ]
+  deps = [
+    ":default_fileutils",
+    "//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" ]

[kjellander_webrtc, 2016/12/02 14:40:40]

Is this one needed? With just so few files, it would be nice to fix the warnings
instead.

+  }
+}
+
 rtc_source_set("test_support") {
   testonly = true
 
   sources = [
     "gmock.h",
     "gtest.h",
-    "testsupport/fileutils.cc",
-    "testsupport/fileutils.h",
     "testsupport/frame_reader.cc",
     "testsupport/frame_reader.h",
     "testsupport/frame_writer.cc",
@@ -130,6 +152,7 @@ rtc_source_set("test_support") {
   ]
 
   deps = [
+    ":fileutils",
     ":video_test_common",
     "../base:gtest_prod",
     "../base:rtc_base_approved",
@@ -204,7 +227,6 @@ rtc_test("test_support_unittests") {
     "rtp_file_reader_unittest.cc",
     "rtp_file_writer_unittest.cc",
     "testsupport/always_passing_unittest.cc",
-    "testsupport/fileutils_unittest.cc",
     "testsupport/frame_reader_unittest.cc",
     "testsupport/frame_writer_unittest.cc",
     "testsupport/metrics/video_metrics_unittest.cc",
@@ -236,6 +258,7 @@ rtc_test("test_support_unittests") {
   }
 
   deps += [
+    ":fileutils_unittests",
     ":test_common",
     ":test_main",
     "../modules/video_capture",