Reland of Pass SequencedTaskRunner to PowerSaveBlocker for ui/file ops

content/browser/download/download_request_core.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 "content/browser/download/download_request_core.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 11 matching lines @@
 #include "content/browser/download/download_interrupt_reasons_impl.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/download/download_request_handle.h"
 #include "content/browser/download/download_stats.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager_delegate.h"
 #include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/power_save_blocker.h"
+#include "content/public/browser/power_save_blocker_factory.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/elements_upload_data_stream.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_request_context.h"
@@ skipping 154 matching lines @@
       last_buffer_size_(0),
       bytes_read_(0),
       pause_count_(0),
       was_deferred_(false),
       is_partial_request_(false),
       started_(false),
       abort_reason_(DOWNLOAD_INTERRUPT_REASON_NONE) {
   DCHECK(request_);
   DCHECK(delegate_);
   RecordDownloadCount(UNTHROTTLED_COUNT);
-  power_save_blocker_ = PowerSaveBlocker::Create(
+  power_save_blocker_ = CreatePowerSaveBlocker(
       PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
       PowerSaveBlocker::kReasonOther, "Download in progress");
   DownloadRequestData* request_data = DownloadRequestData::Get(request_);
   if (request_data) {
     save_info_ = request_data->TakeSaveInfo();
     download_id_ = request_data->download_id();
     on_started_callback_ = request_data->callback();
     DownloadRequestData::Detach(request_);
     is_partial_request_ = save_info_->offset > 0;
   } else {
@@ skipping 413 matching lines @@
     return DOWNLOAD_INTERRUPT_REASON_NONE;
   }
 
   if (http_headers.response_code() == net::HTTP_PARTIAL_CONTENT)
     return DOWNLOAD_INTERRUPT_REASON_SERVER_BAD_CONTENT;
 
   return DOWNLOAD_INTERRUPT_REASON_NONE;
 }
 
 }  // namespace content