Add possibility to define data callback to BitmapFetcher

chrome/browser/extensions/webstore_install_helper.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 "chrome/browser/extensions/webstore_install_helper.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 40 matching lines @@
 void WebstoreInstallHelper::Start() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (icon_url_.is_empty()) {
     icon_decode_complete_ = true;
   } else {
     // No existing |icon_fetcher_| to avoid unbalanced AddRef().
     CHECK(!icon_fetcher_.get());
     AddRef();  // Balanced in OnFetchComplete().
     icon_fetcher_.reset(new chrome::BitmapFetcher(icon_url_, this));
-    icon_fetcher_->Start(
+    icon_fetcher_->Init(
         context_getter_, std::string(),
         net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
         net::LOAD_DO_NOT_SAVE_COOKIES | net::LOAD_DO_NOT_SEND_COOKIES);
+    icon_fetcher_->Start();
   }
 
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&WebstoreInstallHelper::StartWorkOnIOThread, this));
 }
 
 void WebstoreInstallHelper::StartWorkOnIOThread() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
@@ skipping 84 matching lines @@
 
 void WebstoreInstallHelper::ReportResultFromUIThread() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (error_.empty() && parsed_manifest_)
     delegate_->OnWebstoreParseSuccess(id_, icon_, parsed_manifest_.release());
   else
     delegate_->OnWebstoreParseFailure(id_, parse_error_, error_);
 }
 
 }  // namespace extensions