Add mimetypes on the "chrome-resource://" responses....

chrome/browser/dom_ui/chrome_url_data_manager.h

 // Copyright (c) 2006-2008 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 BROWSER_DOM_UI_CHROME_URL_DATA_MANAGER_H__
 #define BROWSER_DOM_UI_CHROME_URL_DATA_MANAGER_H__
 
 #include <map>
 #include <string>
 
@@ skipping 30 matching lines @@
     DataSource(const std::string& source_name,
                MessageLoop* message_loop)
         : source_name_(source_name), message_loop_(message_loop) {}
     virtual ~DataSource() {}
 
     // Sent by the DataManager to request data at |path|.  The source should
     // call SendResponse() when the data is available or if the request could
     // not be satisfied.
     virtual void StartDataRequest(const std::string& path, int request_id) = 0;
 
+    // Return the mimetype that should be sent with this response, or empty
+    // string to specify no mime type.
+    virtual std::string GetMimeType(const std::string& path) const = 0;
+
     // Report that a request has resulted in the data |bytes|.
     // If the request can't be satisfied, pass NULL for |bytes| to indicate
     // the request is over.
     void SendResponse(int request_id, RefCountedBytes* bytes);
 
     MessageLoop* message_loop() const { return message_loop_; }
     const std::string& source_name() const { return source_name_; }
 
    private:
     // The name of this source.
@@ skipping 74 matching lines @@
 
 // The single global instance of ChromeURLDataManager.
 extern ChromeURLDataManager chrome_url_data_manager;
 
 // Register our special URL handler under our special URL scheme.
 // Must be done once at startup.
 void RegisterURLRequestChromeJob();
 
 #endif  // BROWSER_DOM_UI_CHROME_URL_DATA_MANAGER_H__