<webview>: Resolve relative paths as chrome-extension: URLs

chrome/renderer/extensions/document_custom_bindings.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_EXTENSIONS_DOCUMENT_CUSTOM_BINDINGS_H_
 #define CHROME_RENDERER_EXTENSIONS_DOCUMENT_CUSTOM_BINDINGS_H_
 
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 
 namespace extensions {
 
 // Implements custom bindings for document-level operations.
 class DocumentCustomBindings : public ChromeV8Extension {
  public:
   DocumentCustomBindings(Dispatcher* dispatcher, ChromeV8Context* context);
 
  private:
+  // Indicates whether two provided URLs resolve to the same URL.
+  void CompareURLs(const v8::FunctionCallbackInfo<v8::Value>& args);
   // Registers the provided element as a custom element in Blink.
   void RegisterElement(const v8::FunctionCallbackInfo<v8::Value>& args);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_DOCUMENT_CUSTOM_BINDINGS_H_