Change single-interface mojo bindings to use SequencedTaskRunner.

mojo/public/cpp/bindings/interface_ptr.h

Index: mojo/public/cpp/bindings/interface_ptr.h
diff --git a/mojo/public/cpp/bindings/interface_ptr.h b/mojo/public/cpp/bindings/interface_ptr.h
index 4db5e674c4c09a50e074b110856c0d7a24ec82c5..8d812ab6d73f90ab4a273c2228f6c603eb8d47f9 100644
--- a/mojo/public/cpp/bindings/interface_ptr.h
+++ b/mojo/public/cpp/bindings/interface_ptr.h
@@ -14,8 +14,8 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/single_thread_task_runner.h"
-#include "base/threading/thread_task_runner_handle.h"
+#include "base/sequenced_task_runner.h"
+#include "base/threading/sequenced_task_runner_handle.h"
 #include "mojo/public/cpp/bindings/connection_error_callback.h"
 #include "mojo/public/cpp/bindings/interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/lib/interface_ptr_state.h"
@@ -78,8 +78,8 @@ class InterfacePtr {
   // multiple task runners to a single thread for the purposes of task
   // scheduling.
   void Bind(InterfacePtrInfo<Interface> info,
-            scoped_refptr<base::SingleThreadTaskRunner> runner =
-                base::ThreadTaskRunnerHandle::Get()) {
+            scoped_refptr<base::SequencedTaskRunner> runner =
+                base::SequencedTaskRunnerHandle::Get()) {
     reset();
     if (info.is_valid())
       internal_state_.Bind(std::move(info), std::move(runner));
@@ -236,8 +236,8 @@ class InterfacePtr {
 template <typename Interface>
 InterfacePtr<Interface> MakeProxy(
     InterfacePtrInfo<Interface> info,
-    scoped_refptr<base::SingleThreadTaskRunner> runner =
-        base::ThreadTaskRunnerHandle::Get()) {
+    scoped_refptr<base::SequencedTaskRunner> runner =
+        base::SequencedTaskRunnerHandle::Get()) {
   InterfacePtr<Interface> ptr;
   if (info.is_valid())
     ptr.Bind(std::move(info), std::move(runner));