GN: define SK_XML to indicate :xml is enabled.

Without this, nothing ever defines SK_XML for dm/DM.cpp, dm/DMSrcSink.cpp, tests/SkDOMTest.cpp or tests/SkPEGTest.cpp.

GYP does something similiar in gyp/xml.gyp.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4500

Change-Id: I93322722d6d86f5802495d7a2edad2f82ba36f69
Reviewed-on: https://skia-review.googlesource.com/4500
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

diff --git a/BUILD.gn b/BUILD.gn
index f089dc5..4ffbb01 100644 (file)
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -501,6 +501,7 @@ optional("webp") {
 
 optional("xml") {
   enabled = skia_use_expat
+  public_defines = [ "SK_XML" ]
 
   deps = [
     "//third_party/expat",