Migrate SequencedTaskRunnerHandle calls to TaskRunnerHandle calls.

blimp/net/blimp_message_thread_pipe.cc

Index: blimp/net/blimp_message_thread_pipe.cc
diff --git a/blimp/net/blimp_message_thread_pipe.cc b/blimp/net/blimp_message_thread_pipe.cc
index 3848d9b4e02140bb01f5a905d36457e298a3f2c3..b4c9eb7de0cfbfb4fa005bb3df0cfa39fd88b72d 100644
--- a/blimp/net/blimp_message_thread_pipe.cc
+++ b/blimp/net/blimp_message_thread_pipe.cc
@@ -9,7 +9,7 @@
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/sequenced_task_runner.h"
-#include "base/threading/sequenced_task_runner_handle.h"
+#include "base/threading/task_runner_handle.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/net/blimp_message_processor.h"
 
@@ -82,7 +82,7 @@ void BlimpMessageThreadProxy::ProcessMessage(
   net::CompletionCallback wrapped_callback;
   if (!callback.is_null()) {
     wrapped_callback = base::Bind(&DispatchProcessMessageCallback,
-                                  base::SequencedTaskRunnerHandle::Get(),
+                                  base::TaskRunnerHandle::GetSequenced(),
                                   weak_factory_.GetWeakPtr(), callback);
   }