Offload disk accesses to WorkerPool in ExtensionProtocolHandler

webkit/blob/view_blob_internals_job.cc

 // 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.
 
 #include "webkit/blob/view_blob_internals_job.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/time_formatting.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/escape.h"
+#include "net/base/net_errors.h"
 #include "net/url_request/url_request.h"
 #include "webkit/blob/blob_data.h"
 #include "webkit/blob/blob_storage_controller.h"
 
 namespace {
 
 const char kEmptyBlobStorageMessage[] = "No available blob data.";
 const char kRemove[] = "Remove";
 const char kContentType[] = "Content Type: ";
 const char kContentDisposition[] = "Content Disposition: ";
@@ skipping 107 matching lines @@
       StartsWithASCII(request_->url().query(), "remove=", true)) {
     std::string blob_url = request_->url().query().substr(strlen("remove="));
     blob_url = net::UnescapeURLComponent(blob_url,
         net::UnescapeRule::NORMAL | net::UnescapeRule::URL_SPECIAL_CHARS);
     blob_storage_controller_->RemoveBlob(GURL(blob_url));
   }
 
   StartAsync();
 }
 
-bool ViewBlobInternalsJob::GetData(std::string* mime_type,
-                                   std::string* charset,
-                                   std::string* data) const {
+int ViewBlobInternalsJob::GetData(
+      std::string* mime_type,
+      std::string* charset,
+      std::string* data,
+      const net::CompletionCallback& callback) const {
   mime_type->assign("text/html");
   charset->assign("UTF-8");
 
   data->clear();
   StartHTML(data);
   if (blob_storage_controller_->blob_map_.empty())
     data->append(kEmptyBlobStorageMessage);
   else
     GenerateHTML(data);
   EndHTML(data);
-  return true;
+  return net::OK;
 }
 
 void ViewBlobInternalsJob::GenerateHTML(std::string* out) const {
   for (BlobStorageController::BlobMap::const_iterator iter =
            blob_storage_controller_->blob_map_.begin();
        iter != blob_storage_controller_->blob_map_.end();
        ++iter) {
     AddHTMLBoldText(iter->first, out);
     AddHTMLButton(kRemove, iter->first, out);
     GenerateHTMLForBlobData(*iter->second, out);
@@ skipping 57 matching lines @@
     }
 
     if (has_multi_items)
       EndHTMLList(out);
   }
 
   EndHTMLList(out);
 }
 
 }  // namespace webkit_blob