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

third_party/WebKit/public/web/WebFrame.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 100 matching lines @@
     // Ideally it seems blink::TextGranularity should be broken up into
     // blink::TextGranularity and perhaps blink::TextBoundary and then
     // TextGranularity enum could be moved somewhere to public/, and we could
     // just use it here directly without introducing a new enum.
     enum TextGranularity {
         CharacterGranularity = 0,
         WordGranularity,
         TextGranularityLast = WordGranularity,
     };
 
+    enum Feature {
+        ExternalAddSearchProvider = 0,
+        ExternalIsSearchProviderInstalled,
+    };
+
     // Returns the number of live WebFrame objects, used for leak checking.
     BLINK_EXPORT static int instanceCount();
 
     virtual bool isWebLocalFrame() const = 0;
     virtual WebLocalFrame* toWebLocalFrame() = 0;
     virtual bool isWebRemoteFrame() const = 0;
     virtual WebRemoteFrame* toWebRemoteFrame() = 0;
 
     BLINK_EXPORT bool swap(WebFrame*);
 
@@ skipping 558 matching lines @@
     bool inShadowTree() const { return m_scope == WebTreeScopeType::Shadow; }
 
 #if ENABLE(OILPAN)
     static void traceFrames(Visitor*, WebFrame*);
     static void traceFrames(InlinedGlobalMarkingVisitor, WebFrame*);
     void clearWeakFrames(Visitor*);
     void clearWeakFrames(InlinedGlobalMarkingVisitor);
 #endif
 #endif
 
+    virtual void countFeatureUse(Feature) = 0;
+
 protected:
     explicit WebFrame(WebTreeScopeType);
     virtual ~WebFrame();
 
     // Sets the parent WITHOUT fulling adding it to the frame tree.
     // Used to lie to a local frame that is replacing a remote frame,
     // so it can properly start a navigation but wait to swap until
     // commit-time.
     void setParent(WebFrame*);
 
@@ skipping 27 matching lines @@
     WebPrivateOwnPtr<OpenedFrameTracker> m_openedFrameTracker;
 };
 
 #if BLINK_IMPLEMENTATION
 Frame* toCoreFrame(const WebFrame*);
 #endif
 
 } // namespace blink
 
 #endif