Add the "is_ensemble" build variable.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 94ae88909613c151c27565e053f7f7391db76f60..c47ac97a0cfa0e4ae651ed4bc5a8af0a9826b231 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -11,6 +11,9 @@
     # (DT_NEEDED) instead of using dlopen. This helps with automated
     # detection of ABI mismatches and prevents silent errors.
     'linux_link_pulseaudio%': 0,
+    # Override to omit code that depends on the X11, font, and graphics
+    # libraries.
+    'is_ensemble%': 0,
     'conditions': [
       ['OS=="android" or OS=="ios"', {
         # Android and iOS don't use ffmpeg or libvpx.
@@ -62,11 +65,8 @@
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../crypto/crypto.gyp:crypto',
         '../gpu/gpu.gyp:command_buffer_common',
-        '../skia/skia.gyp:skia',
         '../third_party/libyuv/libyuv.gyp:libyuv',
         '../third_party/opus/opus.gyp:opus',
-        '../ui/events/events.gyp:events_base',
-        '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         '../url/url.gyp:url_lib',
         'shared_memory_support',
@@ -455,8 +455,6 @@
         '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',
@@ -469,8 +467,6 @@
         'filters/opus_audio_decoder.h',
         'filters/renderer_impl.cc',
         'filters/renderer_impl.h',
-        'filters/skcanvas_video_renderer.cc',
-        'filters/skcanvas_video_renderer.h',
         'filters/source_buffer_range.cc',
         'filters/source_buffer_range.h',
         'filters/source_buffer_stream.cc',
@@ -528,16 +524,8 @@
         'video/capture/android/video_capture_device_android.h',
         'video/capture/android/video_capture_device_factory_android.cc',
         'video/capture/android/video_capture_device_factory_android.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',
@@ -555,8 +543,6 @@
         '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',
@@ -621,6 +607,37 @@
         ],
       },
       'conditions': [
+        ['is_ensemble==0', {
+          # Add the sources and dependencies that need X11, font, or graphics
+          # libraries.
+          'dependencies': [
+            '../skia/skia.gyp:skia',
+            '../ui/events/events.gyp:events_base',
+            '../ui/gfx/gfx.gyp:gfx',
+          ],
+          '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',
+          ],
+        }, {  # is_ensemble==1
+          # Exclude the sources that need X11, font, or graphics libraries.
+          'sources!': [
+            'filters/default_renderer_factory.cc',
+            'filters/default_renderer_factory.h',

[wtc, 2015/02/12 02:17:45]

These two files are excluded rather than added because they are excluded for
another build configuration (see lines 729-734).

+          ],
+        }],
         ['arm_neon==1', {
           'defines': [
             'USE_NEON'
@@ -756,7 +773,7 @@
         }],
         ['OS=="linux"', {
           'conditions': [
-            ['use_x11==1', {
+            ['use_x11==1 and is_ensemble==0', {
               'dependencies': [
                 '../build/linux/system.gyp:x11',
                 '../build/linux/system.gyp:xdamage',
@@ -765,7 +782,7 @@
                 '../build/linux/system.gyp:xtst',
                 '../ui/gfx/x/gfx_x11.gyp:gfx_x11',
               ],
-            }, {  # else: use_x11==0
+            }, {  # else: use_x11==0 or is_ensemble==1
               'sources!': [
                 'base/user_input_monitor_linux.cc',
               ],