Migrate SequencedTaskRunnerHandle calls to TaskRunnerHandle calls.

content/public/test/test_download_request_handler.cc

Index: content/public/test/test_download_request_handler.cc
diff --git a/content/public/test/test_download_request_handler.cc b/content/public/test/test_download_request_handler.cc
index f4d32181373f29c6b16a58446573a640b2a2d327..22a71706539ce368f452bb1fdf2e773bc18e572c 100644
--- a/content/public/test/test_download_request_handler.cc
+++ b/content/public/test/test_download_request_handler.cc
@@ -18,7 +18,7 @@
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
-#include "base/threading/sequenced_task_runner_handle.h"
+#include "base/threading/task_runner_handle.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/io_buffer.h"
@@ -623,12 +623,12 @@ TestDownloadRequestHandler::TestDownloadRequestHandler()
 
 TestDownloadRequestHandler::TestDownloadRequestHandler(const GURL& url)
     : url_(url) {
-  DCHECK(base::SequencedTaskRunnerHandle::IsSet());
+  DCHECK(base::TaskRunnerHandle::HasSequencedTaskScope());
   base::RunLoop run_loop;
   BrowserThread::PostTaskAndReplyWithResult(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&Interceptor::Register, url_,
-                 base::SequencedTaskRunnerHandle::Get()),
+                 base::TaskRunnerHandle::GetSequenced()),
       base::Bind(&StoreValueAndInvokeClosure<base::WeakPtr<Interceptor>>,
                  run_loop.QuitClosure(), &interceptor_));
   run_loop.Run();