Add StoragePartition's ProtocolHandlers at URLRequestContext construction time.

content/browser/webui/url_data_manager_backend.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
 #define CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/supports_user_data.h"
 #include "content/browser/webui/url_data_manager.h"
 #include "net/url_request/url_request_job_factory.h"
 
 class GURL;
 
 namespace base {
 class RefCountedMemory;
 }
 
 namespace content {
+class ResourceContext;
 class URLDataManagerBackend;
 class URLDataSourceImpl;
 class URLRequestChromeJob;
 
 // URLDataManagerBackend is used internally by ChromeURLDataManager on the IO
 // thread. In most cases you can use the API in ChromeURLDataManager and ignore
 // this class. URLDataManagerBackend is owned by ResourceContext.
 class URLDataManagerBackend : public base::SupportsUserData::Data {
  public:
   typedef int RequestID;
 
   URLDataManagerBackend();
   virtual ~URLDataManagerBackend();
 
   // Invoked to create the protocol handler for chrome://. |is_incognito| should
-  // be set for incognito profiles.
+  // be set for incognito profiles. Called on the UI thread, though the protocol

[awong, 2013/02/05 02:57:11]

Just saying "Called on the UI Thread." is probably good enough here.

+  // handler is used on the IO thread.
   static net::URLRequestJobFactory::ProtocolHandler* CreateProtocolHandler(
-      URLDataManagerBackend* backend,
+      content::ResourceContext* resource_context,
       bool is_incognito);
 
   // Adds a DataSource to the collection of data sources.
   void AddDataSource(URLDataSourceImpl* source);
 
   // DataSource invokes this. Sends the data to the URLRequest.
   void DataAvailable(RequestID request_id, base::RefCountedMemory* bytes);
 
   static net::URLRequestJob* Factory(net::URLRequest* request,
                                      const std::string& scheme);
@@ skipping 35 matching lines @@
 
   // The ID we'll use for the next request we receive.
   RequestID next_request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(URLDataManagerBackend);
 };
 
 // Creates protocol handler for chrome-devtools://. |is_incognito| should be
 // set for incognito profiles.
 net::URLRequestJobFactory::ProtocolHandler*
-CreateDevToolsProtocolHandler(URLDataManagerBackend* backend,
+CreateDevToolsProtocolHandler(content::ResourceContext* resource_context,
                               bool is_incognito);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_