Add feature use counting for window.external.AddSearchProvider (Blink side).

third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp b/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
index e7932c45aa33a815e914a360b76d7bcaaefe55a8..9332b966a730139f18bbc040617cadf5e65102bf 100644
--- a/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
@@ -696,6 +696,11 @@ WebRect WebRemoteFrameImpl::selectionBoundsRect() const
     return WebRect();
 }
 
+void WebRemoteFrameImpl::countFeatureUse(WebFrame::Feature)
+{
+    ASSERT_NOT_REACHED();
+}
+
 bool WebRemoteFrameImpl::selectionStartHasSpellingMarkerFor(int from, int length) const
 {
     ASSERT_NOT_REACHED();