Add a WebDocument::watchCssSelectors(selectors)

public/web/WebDocument.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 105 matching lines @@
     WEBKIT_EXPORT WebAccessibilityObject accessibilityObject() const;
 
     // Gets the accessibility object for an object on this page by ID.
     WEBKIT_EXPORT WebAccessibilityObject accessibilityObjectFromID(int axID) const;
     // Inserts the given CSS source code as a user stylesheet in the document.
     // Meant for programatic/one-off injection, as opposed to
     // WebView::addUserStyleSheet which inserts styles for the lifetime of the
     // WebView.
     WEBKIT_EXPORT void insertUserStyleSheet(const WebString& sourceCode, UserStyleLevel);
 
+    // Arranges to call WebFrameClient::didMatchCss(frame(), ...) when one of
+    // the selectors matches or stops matching an element in this document.
+    // Each call to this method overrides any previous calls.
+    WEBKIT_EXPORT void watchCssSelectors(const WebVector<WebString>& selectors);

[Jeffrey Yasskin, 2013/07/12 22:40:42]

Used by https://codereview.chromium.org/19045002/.

+
     WEBKIT_EXPORT WebVector<WebDraggableRegion> draggableRegions() const;
 
 #if WEBKIT_IMPLEMENTATION
     WebDocument(const WTF::PassRefPtr<WebCore::Document>&);
     WebDocument& operator=(const WTF::PassRefPtr<WebCore::Document>&);
     operator WTF::PassRefPtr<WebCore::Document>() const;
 #endif
 };
 
 } // namespace WebKit
 
 #endif