Add BUILD.gn files for chromecast/media

media/base/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/features.gni")
 import("//build/config/ui.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
 
 source_set("base") {
   visibility = [ "//media/*" ]
   sources = [
     "audio_block_fifo.cc",
     "audio_block_fifo.h",
     "audio_buffer.cc",
@@ skipping 217 matching lines @@
     ]
     sources += [ "user_input_monitor_linux.cc" ]
     deps += [
       "//ui/events:events_base",
       "//ui/gfx/x",
     ]
   } else if (is_mac) {
     sources += [ "user_input_monitor_mac.cc" ]
 
     # Required by video_frame.cc.
-    libs = [
-      "CoreVideo.framework"
-    ]
+    libs = [ "CoreVideo.framework" ]
   } else if (is_win) {
     sources += [ "user_input_monitor_win.cc" ]
   } else {
     defines += [ "DISABLE_USER_INPUT_MONITOR" ]
   }
 
   if (current_cpu == "x86" || current_cpu == "x64") {
     sources += [ "simd/convert_yuv_to_rgb_x86.cc" ]
     deps += [
       ":media_yasm",
@@ skipping 241 matching lines @@
       if (is_posix) {
         yasm_flags += [ "-DELF" ]
         if (current_cpu == "x64") {
           # TODO(ajwong): Why isn't this true in mac?
           yasm_flags += [ "-DPIC" ]
         }
       }
     }
   }
 }