1 files changed, 1 insertions, 0 deletions
diff --git a/ui/ui.gyp b/ui/ui.gyp
index c06125c..d173184 100644
--- a/ui/ui.gyp
+++ b/ui/ui.gyp
@@ -377,6 +377,7 @@
         'gfx/color_utils.h',
         'gfx/display.cc',
         'gfx/display.h',
+        'gfx/display_observer.cc',
         'gfx/display_observer.h',
         'gfx/favicon_size.cc',
         'gfx/favicon_size.h',