Provide a method to remove inserted style sheet

third_party/WebKit/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 39 matching lines @@
 
 class Document;
 class WebAXObject;
 class WebElement;
 class WebFormElement;
 class WebElementCollection;
 class WebString;
 class WebURL;
 struct WebDistillabilityFeatures;
 
+using WebStyleSheetId = unsigned;
+
 // Provides readonly access to some properties of a DOM document.
 class WebDocument : public WebNode {
  public:
   WebDocument() {}
   WebDocument(const WebDocument& e) : WebNode(e) {}
 
   WebDocument& operator=(const WebDocument& e) {
     WebNode::Assign(e);
     return *this;
   }
@@ skipping 43 matching lines @@
 
   // Gets the accessibility object for this document.
   BLINK_EXPORT WebAXObject AccessibilityObject() const;
 
   // Gets the accessibility object for an object on this page by ID.
   BLINK_EXPORT WebAXObject AccessibilityObjectFromID(int ax_id) const;
 
   // Gets the accessibility object that has focus.
   BLINK_EXPORT WebAXObject FocusedAccessibilityObject() const;
 
-  // Inserts the given CSS source code as a stylesheet in the document.
-  BLINK_EXPORT void InsertStyleSheet(const WebString& source_code);
+  // Inserts the given CSS source code as a stylesheet in the document, and
+  // return its id.
+  BLINK_EXPORT WebStyleSheetId InsertStyleSheet(const WebString& source_code);
+
+  // Removes the CSS which was previously inserted by a call to
+  // InsertStyleSheet().
+  BLINK_EXPORT void RemoveInsertedStyleSheet(WebStyleSheetId);
 
   // 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.
   BLINK_EXPORT void WatchCSSSelectors(const WebVector<WebString>& selectors);
 
   BLINK_EXPORT WebVector<WebDraggableRegion> DraggableRegions() const;
 
   BLINK_EXPORT v8::Local<v8::Value> RegisterEmbedderCustomElement(
       const WebString& name,
       v8::Local<v8::Value> options,
       WebExceptionCode&);
 
   BLINK_EXPORT WebURL ManifestURL() const;
   BLINK_EXPORT bool ManifestUseCredentials() const;
   BLINK_EXPORT WebDistillabilityFeatures DistillabilityFeatures();
 
 #if BLINK_IMPLEMENTATION
   BLINK_EXPORT WebDocument(Document*);
   BLINK_EXPORT WebDocument& operator=(Document*);
   BLINK_EXPORT operator Document*() const;
 #endif
 };
 
 DECLARE_WEB_NODE_TYPE_CASTS(WebDocument);
 
 }  // namespace blink
 
 #endif