Added WebRuntimeFeatures plumbing to enable Finch experiment.

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

Index: third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
diff --git a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
index d73fc7d5b95438bd83f46aff67645ea1315461a0..e68345d9246e54a2423e6c6e9d47cf327b5ca4c1 100644
--- a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
+++ b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
@@ -205,6 +205,11 @@ void WebRuntimeFeatures::enablePermissionsAPI(bool enable)
     RuntimeEnabledFeatures::setPermissionsEnabled(enable);
 }
 
+void WebRuntimeFeatures::enablePointerEvent(bool enable)
+{
+    RuntimeEnabledFeatures::setPointerEventEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableScriptedSpeech(bool enable)
 {
     RuntimeEnabledFeatures::setScriptedSpeechEnabled(enable);