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diff --git a/ceee/ie/plugin/scripting/userscripts_librarian.h b/ceee/ie/plugin/scripting/userscripts_librarian.h
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+// Copyright (c) 2010 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.
+//
+// Utility class to maintain user scripts and their matching URLs.
+
+#ifndef CEEE_IE_PLUGIN_SCRIPTING_USERSCRIPTS_LIBRARIAN_H_
+#define CEEE_IE_PLUGIN_SCRIPTING_USERSCRIPTS_LIBRARIAN_H_
+
+#include <windows.h>
+
+#include <string>
+#include <vector>
+
+#include "chrome/common/extensions/user_script.h"
+#include "googleurl/src/gurl.h"
+
+
+// The manager of UserScripts responsible for loading them from an extension
+// and then returning the ones that match a given URL.
+// TODO(mad@chromium.org): Find a way to reuse code from
+// chrome/renderer/user_script_slave.
+class UserScriptsLibrarian {
+ public:
+  typedef struct {
+    std::wstring file_path;
+    std::string content;
+  } JsFile;
+  typedef std::vector<JsFile> JsFileList;
+
+  UserScriptsLibrarian();
+  ~UserScriptsLibrarian();
+
+  // Adds a list of users scripts to our current list.
+  HRESULT AddUserScripts(const UserScriptList& user_scripts);
+
+  // Identifies if we have any userscript that would match the given URL.
+  bool HasMatchingUserScripts(const GURL& url) const;
+
+  // Retrieve the CSS content from user scripts that match the given URL.
+  // @param url The URL to match.
+  // @param require_all_frames Whether to require the all_frames property of the
+  //        user script to be true.
+  // @param css_content The single stream of CSS content.
+  HRESULT GetMatchingUserScriptsCssContent(
+      const GURL& url,
+      bool require_all_frames,
+      std::string* css_content) const;
+
+  // Retrieve the JS content from user scripts that match the given URL.
+  // @param url The URL to match.
+  // @param location The location where the scripts will be run at.
+  // @param require_all_frames Whether to require the all_frames property of the
+  //        user script to be true.
+  // @param js_file_list A map of file names to JavaScript content to allow the
+  //        caller to apply them individually (e.g., each with their own script
+  //        engine).
+  HRESULT GetMatchingUserScriptsJsContent(
+      const GURL& url,
+      UserScript::RunLocation location,
+      bool require_all_frames,
+      JsFileList* js_file_list);
+
+ private:
+  // A helper function to load the content of a script file if it has not
+  // already been done, or explicitly set.
+  void LoadFiles(UserScript::FileList* file_list);
+
+  UserScriptList user_scripts_;
+  DISALLOW_COPY_AND_ASSIGN(UserScriptsLibrarian);
+};
+
+#endif  // CEEE_IE_PLUGIN_SCRIPTING_USERSCRIPTS_LIBRARIAN_H_