Make ffmpeg specific unit_tests depend on media_use_ffmpeg

media/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/ui.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
 
@@ skipping 488 matching lines @@
     "//ui/gfx:test_support",
     "//url",
   ]
 
   if (is_android) {
     deps += [
       "//media/base/android",
       # TODO(GYP)
       #"//testing/android:native_test_native_code"
     ]
-  } else {
+  }
+
+  if (media_use_ffmpeg) {
     sources += [
       "ffmpeg/ffmpeg_common_unittest.cc",
       "filters/audio_decoder_unittest.cc",
       "filters/audio_file_reader_unittest.cc",
       "filters/blocking_url_protocol_unittest.cc",
       "filters/ffmpeg_demuxer_unittest.cc",
       "filters/ffmpeg_glue_unittest.cc",
       "filters/ffmpeg_video_decoder_unittest.cc",
       "filters/in_memory_url_protocol_unittest.cc",
       "filters/pipeline_integration_test.cc",
@@ skipping 198 matching lines @@
     deps = [
       ":media",
       ":shared_memory_support",
       "//base",
       "//ui/gl",
       "//ui/gfx",
       "//ui/gfx/geometry",
     ]
   }
 }