base: Remove most uses of MessageLoopProxy

base/threading/sequenced_worker_pool.h

Index: base/threading/sequenced_worker_pool.h
diff --git a/base/threading/sequenced_worker_pool.h b/base/threading/sequenced_worker_pool.h
index 0b6c5f9e392c06f8d9fd3297cd81ae918829bc45..2126b0d04d5ce3687458095f9539585345705178 100644
--- a/base/threading/sequenced_worker_pool.h
+++ b/base/threading/sequenced_worker_pool.h
@@ -11,8 +11,10 @@
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
+#include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "base/task_runner.h"
 
 namespace tracked_objects {
@@ -21,7 +23,7 @@ class Location;
 
 namespace base {
 
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 
 template <class T> class DeleteHelper;
 
@@ -345,7 +347,7 @@ class BASE_EXPORT SequencedWorkerPool : public TaskRunner {
   class Inner;
   class Worker;
 
-  const scoped_refptr<MessageLoopProxy> constructor_message_loop_;
+  const scoped_refptr<SingleThreadTaskRunner> constructor_task_runner_;
 
   // Avoid pulling in too many headers by putting (almost) everything
   // into |inner_|.