[SPv2] Add CSS mask support

third_party/WebKit/Source/core/css/FontFace.h

Index: third_party/WebKit/Source/core/css/FontFace.h
diff --git a/third_party/WebKit/Source/core/css/FontFace.h b/third_party/WebKit/Source/core/css/FontFace.h
index 495dd3f1b8aa247d2b07a7e9ac22221833dfc60f..b38fd4142b45a2f732ced69ff5d24713940215d1 100644
--- a/third_party/WebKit/Source/core/css/FontFace.h
+++ b/third_party/WebKit/Source/core/css/FontFace.h
@@ -56,10 +56,10 @@ class StylePropertySet;
 class StyleRuleFontFace;
 class WebTaskRunner;
 
-class FontFace : public GarbageCollectedFinalized<FontFace>,
-                 public ScriptWrappable,
-                 public ActiveScriptWrappable<FontFace>,
-                 public ContextLifecycleObserver {
+class CORE_EXPORT FontFace : public GarbageCollectedFinalized<FontFace>,
+                             public ScriptWrappable,
+                             public ActiveScriptWrappable<FontFace>,
+                             public ContextLifecycleObserver {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(FontFace);
   WTF_MAKE_NONCOPYABLE(FontFace);