Add the "is_ensemble" build variable.

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 628aa06e15b38955bc72eeebc9d4da011dd91028..977348444ca227b46b6654c8f50ea0cd326901ae 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -122,8 +122,6 @@ component("media") {
     "filters/frame_processor.h",
     "filters/gpu_video_accelerator_factories.cc",
     "filters/gpu_video_accelerator_factories.h",
-    "filters/gpu_video_decoder.cc",
-    "filters/gpu_video_decoder.h",
     "filters/h264_bit_reader.cc",
     "filters/h264_bit_reader.h",
     "filters/h264_parser.cc",
@@ -132,8 +130,6 @@ component("media") {
     "filters/jpeg_parser.h",
     "filters/renderer_impl.cc",
     "filters/renderer_impl.h",
-    "filters/skcanvas_video_renderer.cc",
-    "filters/skcanvas_video_renderer.h",
     "filters/source_buffer_platform.cc",
     "filters/source_buffer_platform.h",
     "filters/source_buffer_range.cc",
@@ -178,16 +174,8 @@ component("media") {
     "midi/usb_midi_jack.h",
     "midi/usb_midi_output_stream.cc",
     "midi/usb_midi_output_stream.h",
-    "video/capture/fake_video_capture_device.cc",
-    "video/capture/fake_video_capture_device.h",
-    "video/capture/fake_video_capture_device_factory.h",
-    "video/capture/fake_video_capture_device_factory.cc",
     "video/capture/file_video_capture_device.cc",
     "video/capture/file_video_capture_device.h",
-    "video/capture/file_video_capture_device_factory.h",
-    "video/capture/file_video_capture_device_factory.cc",
-    "video/capture/linux/video_capture_device_factory_linux.cc",
-    "video/capture/linux/video_capture_device_factory_linux.h",
     "video/capture/linux/video_capture_device_linux.cc",
     "video/capture/linux/video_capture_device_linux.h",
     "video/capture/linux/video_capture_device_chromeos.cc",
@@ -205,8 +193,6 @@ component("media") {
     "video/capture/mac/video_capture_device_qtkit_mac.mm",
     "video/capture/video_capture_device.cc",
     "video/capture/video_capture_device.h",
-    "video/capture/video_capture_device_factory.cc",
-    "video/capture/video_capture_device_factory.h",
     "video/capture/video_capture_device_info.cc",
     "video/capture/video_capture_device_info.h",
     "video/capture/video_capture_types.cc",
@@ -320,11 +306,15 @@ component("media") {
 
   if (!is_android) {
     sources += [
-      "filters/default_renderer_factory.cc",
-      "filters/default_renderer_factory.h",
       "filters/opus_audio_decoder.cc",
       "filters/opus_audio_decoder.h",
     ]
+    if (!is_ensemble) {
+      sources += [
+        "filters/default_renderer_factory.cc",
+        "filters/default_renderer_factory.h",
+      ]
+    }
   } else {
     sources += [
       "midi/midi_manager_android.cc",
@@ -480,14 +470,38 @@ component("media") {
     "//crypto",
     "//crypto:platform",  # TODO(ajwong): This used to be provided by crypto.gyp via export_dependent_settings
     "//gpu/command_buffer/common",
-    "//skia",
     "//third_party/libyuv",
     "//third_party/opus",
-    "//ui/events:events_base",
-    "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
   ]
+
+  # Add the sources and dependencies that need X11, font, or graphics
+  # libraries.
+  if (!is_ensemble) {
+    sources += [
+      "filters/gpu_video_decoder.cc",
+      "filters/gpu_video_decoder.h",
+      "filters/skcanvas_video_renderer.cc",
+      "filters/skcanvas_video_renderer.h",
+      "video/capture/fake_video_capture_device.cc",
+      "video/capture/fake_video_capture_device.h",
+      "video/capture/fake_video_capture_device_factory.cc",
+      "video/capture/fake_video_capture_device_factory.h",
+      "video/capture/file_video_capture_device_factory.cc",
+      "video/capture/file_video_capture_device_factory.h",
+      "video/capture/linux/video_capture_device_factory_linux.cc",
+      "video/capture/linux/video_capture_device_factory_linux.h",
+      "video/capture/video_capture_device_factory.cc",
+      "video/capture/video_capture_device_factory.h",
+    ]
+
+    deps += [
+      "//skia",
+      "//ui/events:events_base",
+      "//ui/gfx",
+    ]
+  }
 }
 
 # Minimal media component for media/cast on iOS.