Use TaskScheduler instead of WorkerPool in url_request_simple_job.cc.

net/url_request/url_request_simple_job.cc

Index: net/url_request/url_request_simple_job.cc
diff --git a/net/url_request/url_request_simple_job.cc b/net/url_request/url_request_simple_job.cc
index 4f8b01ab3a7ca29de1ebf9c097e46ba72980afe9..6ec37c597911c4a8f380858d0a057ccb0d5e894d 100644
--- a/net/url_request/url_request_simple_job.cc
+++ b/net/url_request/url_request_simple_job.cc
@@ -11,6 +11,7 @@
 #include "base/location.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/single_thread_task_runner.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
 #include "net/base/io_buffer.h"
@@ -36,7 +37,6 @@ URLRequestSimpleJob::URLRequestSimpleJob(URLRequest* request,
                                          NetworkDelegate* network_delegate)
     : URLRangeRequestJob(request, network_delegate),
       next_data_offset_(0),
-      task_runner_(base::WorkerPool::GetTaskRunner(false)),
       weak_factory_(this) {
 }
 
@@ -71,20 +71,18 @@ int URLRequestSimpleJob::ReadRawData(IOBuffer* buf, int buf_size) {
   if (buf_size == 0)
     return 0;
 
-  // Do memory copy on a background thread. See crbug.com/422489.
-  GetTaskRunner()->PostTaskAndReply(
-      FROM_HERE, base::Bind(&CopyData, make_scoped_refptr(buf), buf_size, data_,
-                            next_data_offset_),
+  // Do memory copy asynchronously. See crbug.com/422489.

[xunjieli, 2017/02/10 16:30:19]

Please edit this comment per previous comment.

"Do memory copy asynchronously on a thread that is not the network thread."

[fdoray, 2017/02/13 15:37:51]

Done.

+  base::PostTaskWithTraitsAndReply(
+      FROM_HERE, base::TaskTraits().WithShutdownBehavior(
+                     base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+      base::Bind(&CopyData, make_scoped_refptr(buf), buf_size, data_,
+                 next_data_offset_),
       base::Bind(&URLRequestSimpleJob::ReadRawDataComplete,
                  weak_factory_.GetWeakPtr(), buf_size));
   next_data_offset_ += buf_size;
   return ERR_IO_PENDING;
 }
 
-base::TaskRunner* URLRequestSimpleJob::GetTaskRunner() const {
-  return task_runner_.get();
-}
-
 int URLRequestSimpleJob::GetData(std::string* mime_type,
                                  std::string* charset,
                                  std::string* data,