Replace MessageLoopProxy usage with ThreadTaskRunnerHandle in sync module.

MessageLoopProxy is deprecated.
This basically does a search and replace:

MessageLoopProxy::current() -> ThreadTaskRunnerHandle::Get().

BUG=391045

Review URL: https://codereview.chromium.org/1110063004

Cr-Commit-Position: refs/heads/master@{#327662}

2 files changed, 6 insertions, 9 deletions

diff --git a/sync/internal_api/public/util/weak_handle.cc b/sync/internal_api/public/util/weak_handle.cc
index 0ed142e..e0864ed 100644
--- a/sync/internal_api/public/util/weak_handle.cc
+++ b/sync/internal_api/public/util/weak_handle.cc
@@ -8,17 +8,17 @@
 
 #include "base/callback.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/thread_task_runner_handle.h"
 
 namespace syncer {
 
 namespace internal {
 
 WeakHandleCoreBase::WeakHandleCoreBase()
-    : owner_loop_proxy_(base::MessageLoopProxy::current()) {}
+    : owner_loop_task_runner_(base::ThreadTaskRunnerHandle::Get()) {}
 
 bool WeakHandleCoreBase::IsOnOwnerThread() const {
-  return owner_loop_proxy_->BelongsToCurrentThread();
+  return owner_loop_task_runner_->BelongsToCurrentThread();
 }
 
 WeakHandleCoreBase::~WeakHandleCoreBase() {}
@@ -26,7 +26,7 @@ WeakHandleCoreBase::~WeakHandleCoreBase() {}
 void WeakHandleCoreBase::PostToOwnerThread(
     const tracked_objects::Location& from_here,
     const base::Closure& fn) const {
-  if (!owner_loop_proxy_->PostTask(from_here, fn)) {
+  if (!owner_loop_task_runner_->PostTask(from_here, fn)) {
     DVLOG(1) << "Could not post task from " << from_here.ToString();
   }
 }
diff --git a/sync/internal_api/public/util/weak_handle.h b/sync/internal_api/public/util/weak_handle.h
index c299be7..7a11a15 100644
--- a/sync/internal_api/public/util/weak_handle.h
+++ b/sync/internal_api/public/util/weak_handle.h
@@ -58,12 +58,9 @@
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "sync/base/sync_export.h"
 
-namespace base {
-class MessageLoopProxy;
-}  // namespace base
-
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
@@ -118,7 +115,7 @@ class SYNC_EXPORT WeakHandleCoreBase {
 
  private:
   // May be used on any thread.
-  const scoped_refptr<base::MessageLoopProxy> owner_loop_proxy_;
+  const scoped_refptr<base::SingleThreadTaskRunner> owner_loop_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(WeakHandleCoreBase);
 };