Update makefiles after merge of Chromium at r208191

This commit was generated by merge_from_chromium.py.

Change-Id: Ia481b78994f5b954ff2a63f72c76dc6d19b405fc
diff --git a/ots.target.linux-arm.mk b/ots.target.linux-arm.mk
index 0cbd1fe..9394b71 100644
--- a/ots.target.linux-arm.mk
+++ b/ots.target.linux-arm.mk
@@ -91,6 +91,7 @@
 MY_CFLAGS_C :=
 
 MY_DEFS := \
+	'-DANGLE_DX11' \
 	'-D_FILE_OFFSET_BITS=64' \
 	'-DUSE_LINUX_BREAKPAD' \
 	'-DNO_TCMALLOC' \