Expose UseCounter::Feature enum out of blink as WebFeature

third_party/WebKit/public/platform/WebFeature.h

Index: third_party/WebKit/public/platform/WebFeature.h
diff --git a/third_party/WebKit/public/platform/WebFeature.h b/third_party/WebKit/public/platform/WebFeature.h
new file mode 100644
index 0000000000000000000000000000000000000000..0acc877f136a9edc12753e9ee4a4aa2aa7b295d2
--- /dev/null
+++ b/third_party/WebKit/public/platform/WebFeature.h
@@ -0,0 +1,18 @@
+#ifndef WebFeature_h
+#define WebFeature_h
+
+namespace blink {
+
+// A WebFeature conceptually represents some particular web-exposed API
+// or code path which can be used/triggered by a web page.
+// TODO(lunalu): Replace occurance of UseCounter::Feature by WebFeature in
+// Blink.
+// TODO(rbyers): Add CSS and animated CSS feature types by making this a
+// more sophisticated class.
+enum class WebFeature : uint32_t {
+#include "UseCounterFeature.def"
+};
+
+}  // namespace blink
+
+#endif  // WebFeature_h