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..1a668439e56a29e32aebc9945aff77a84c79dd77 100644
--- a/webrtc/test/BUILD.gn
+++ b/webrtc/test/BUILD.gn
@@ -110,8 +110,6 @@ rtc_source_set("test_support") {
   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 +128,7 @@ rtc_source_set("test_support") {
   ]
 
   deps = [
+    ":fileutils",
     ":video_test_common",
     "../base:gtest_prod",
     "../base:rtc_base_approved",
@@ -204,7 +203,6 @@ 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 +234,7 @@ rtc_test("test_support_unittests") {
   }
 
   deps += [
+    ":fileutils_unittests",
     ":test_common",
     ":test_main",
     "../modules/video_capture",
@@ -388,3 +387,26 @@ rtc_source_set("test_renderer") {
     "//testing/gtest",
   ]
 }
+
+rtc_source_set("fileutils") {

[kjellander_webrtc, 2016/12/02 14:31:08]

Move these closer to the reference

+  testonly = true
+  sources = [
+    "testsupport/fileutils.cc",
+    "testsupport/fileutils.h",
+  ]
+}
+rtc_source_set("fileutils_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" ]
+  }
+}