Migrate SequencedTaskRunnerHandle calls to TaskRunnerHandle calls.

blimp/client/session/blimp_client_session.cc

Index: blimp/client/session/blimp_client_session.cc
diff --git a/blimp/client/session/blimp_client_session.cc b/blimp/client/session/blimp_client_session.cc
index dd12e5bb4f9c636cd4b116ff0d18fb986f33ee4e..205191d8ee477be27528f5a0658e064d0b6319e3 100644
--- a/blimp/client/session/blimp_client_session.cc
+++ b/blimp/client/session/blimp_client_session.cc
@@ -9,9 +9,9 @@
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/numerics/safe_conversions.h"
+#include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/threading/sequenced_task_runner_handle.h"
-#include "base/threading/thread_task_runner_handle.h"
+#include "base/threading/task_runner_handle.h"
 #include "blimp/client/app/blimp_client_switches.h"
 #include "blimp/client/feature/ime_feature.h"
 #include "blimp/client/feature/navigation_feature.h"
@@ -46,7 +46,7 @@ class CrossThreadNetworkEventObserver : public NetworkEventObserver {
  public:
   CrossThreadNetworkEventObserver(
       const base::WeakPtr<NetworkEventObserver>& target,
-      const scoped_refptr<base::TaskRunner>& task_runner)
+      const scoped_refptr<base::SequencedTaskRunner>& task_runner)
       : target_(target), task_runner_(task_runner) {}
 
   ~CrossThreadNetworkEventObserver() override {}
@@ -64,7 +64,7 @@ class CrossThreadNetworkEventObserver : public NetworkEventObserver {
 
  private:
   base::WeakPtr<NetworkEventObserver> target_;
-  scoped_refptr<base::TaskRunner> task_runner_;
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
 };
 
 }  // namespace
@@ -192,7 +192,7 @@ BlimpClientSession::BlimpClientSession(const GURL& assigner_endpoint)
   blimp_connection_statistics_ = new BlimpConnectionStatistics();
   net_components_.reset(new ClientNetworkComponents(
       base::WrapUnique(new CrossThreadNetworkEventObserver(
-          weak_factory_.GetWeakPtr(), base::SequencedTaskRunnerHandle::Get())),
+          weak_factory_.GetWeakPtr(), base::TaskRunnerHandle::GetSequenced())),
       base::WrapUnique(blimp_connection_statistics_)));
 
   assignment_source_.reset(new AssignmentSource(