Migrate SequencedTaskRunnerHandle calls to TaskRunnerHandle calls.

content/browser/download/url_downloader.cc

Index: content/browser/download/url_downloader.cc
diff --git a/content/browser/download/url_downloader.cc b/content/browser/download/url_downloader.cc
index de8af79d39dab8f936f23e82a815d538ea7d3372..d22d87ab9391b4baffcfd08d765fe89747803a34 100644
--- a/content/browser/download/url_downloader.cc
+++ b/content/browser/download/url_downloader.cc
@@ -7,7 +7,7 @@
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/macros.h"
-#include "base/threading/sequenced_task_runner_handle.h"
+#include "base/threading/task_runner_handle.h"
 #include "content/browser/byte_stream.h"
 #include "content/browser/download/download_create_info.h"
 #include "content/browser/download/download_manager_impl.h"
@@ -150,7 +150,7 @@ void UrlDownloader::StartReading(bool is_continuation) {
   int buf_size;
   if (!core_.OnWillRead(&buf, &buf_size, -1)) {
     request_->CancelWithError(net::ERR_ABORTED);
-    base::SequencedTaskRunnerHandle::Get()->PostTask(
+    base::TaskRunnerHandle::GetSequenced()->PostTask(
         FROM_HERE, base::Bind(&UrlDownloader::ResponseCompleted,
                               weak_ptr_factory_.GetWeakPtr()));
     return;
@@ -170,7 +170,7 @@ void UrlDownloader::StartReading(bool is_continuation) {
   } else {
     // Else, trigger OnReadCompleted asynchronously to avoid starving the IO
     // thread in case the URLRequest can provide data synchronously.
-    base::SequencedTaskRunnerHandle::Get()->PostTask(
+    base::TaskRunnerHandle::GetSequenced()->PostTask(
         FROM_HERE,
         base::Bind(&UrlDownloader::OnReadCompleted,
                    weak_ptr_factory_.GetWeakPtr(), request_.get(), bytes_read));
@@ -223,7 +223,7 @@ void UrlDownloader::OnStart(
     const DownloadUrlParameters::OnStartedCallback& callback) {
   create_info->request_handle.reset(
       new RequestHandle(weak_ptr_factory_.GetWeakPtr(), manager_,
-                        base::SequencedTaskRunnerHandle::Get()));
+                        base::TaskRunnerHandle::GetSequenced()));
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(&DownloadManagerImpl::StartDownload,
                                      manager_, base::Passed(&create_info),