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

third_party/WebKit/Source/web/WebLocalFrameImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 209 matching lines @@
     WebString contentAsText(size_t maxChars) const override;
     WebString contentAsMarkup() const override;
     WebString layoutTreeAsText(LayoutAsTextControls toShow = LayoutAsTextNormal) const override;
 
     WebString markerTextForListItem(const WebElement&) const override;
     WebRect selectionBoundsRect() const override;
 
     bool selectionStartHasSpellingMarkerFor(int from, int length) const override;
     WebString layerTreeAsText(bool showDebugInfo = false) const override;
 
+    void countFeatureUse(Feature) override;
+
     void registerTestInterface(const WebString& name, WebTestInterfaceFactory*) override;
 
     // Creates a test interface by name if available, returns an empty handle
     // for unknown names.
     v8::Local<v8::Value> createTestInterface(const AtomicString& name);
 
     // WebLocalFrame methods:
     void initializeToReplaceRemoteFrame(WebRemoteFrame*, const WebString& name, WebSandboxFlags) override;
     void setAutofillClient(WebAutofillClient*) override;
     WebAutofillClient* autofillClient() override;
@@ skipping 160 matching lines @@
     // cleared upon close().
     SelfKeepAlive<WebLocalFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif