Fix few compilation errors on Windows in media/ during Windows GN build.

media/audio/BUILD.gn

Index: media/audio/BUILD.gn
diff --git a/media/audio/BUILD.gn b/media/audio/BUILD.gn
index 93f9bbd31f82c1df124164f3cee51bf81e140d9c..5cf24143988d725f40b6039c4189ffafdf15357f 100644
--- a/media/audio/BUILD.gn
+++ b/media/audio/BUILD.gn
@@ -266,7 +266,6 @@ source_set("unittests") {
   sources = [
     "audio_input_controller_unittest.cc",
     "audio_input_unittest.cc",
-    "audio_low_latency_input_output_unittest.cc",
     "audio_manager_unittest.cc",
     "audio_output_controller_unittest.cc",
     "audio_output_device_unittest.cc",
@@ -327,6 +326,9 @@ source_set("unittests") {
   }
 
   if (use_alsa) {
-    sources += [ "alsa/alsa_output_unittest.cc" ]
+    sources += [
+      "alsa/alsa_output_unittest.cc",
+      "audio_low_latency_input_output_unittest.cc",

[tommi (sloooow) - chröme, 2017/09/04 17:14:27]

I'm trying to figure out why this file got moved to the 'use_alsa' section, but
don't see why.  Any chance you remember why it had to be moved?

[Slava Chigrin, 2017/09/05 08:25:10]

The same condition was in GYP in that time, see
https://chromium.googlesource.com/chromium/src/+/2a25593b2d7f5c5f963f6c6dfc33...

I just moved it to GN, may be there was some compilation error in that time on
some plarform - I can't remember exactly.

Initially this condition was introduced in this CL
https://chromiumcodereview.appspot.com/12316049/diff/1/media/media.gyp , may be
it worth to ask about it there.

+    ]
   }
 }