Convert MessageLoopProxy to TaskRunner in FileUtilProxy

base/file_util_proxy.h

Index: base/file_util_proxy.h
diff --git a/base/file_util_proxy.h b/base/file_util_proxy.h
index 0b2cae5f770a1d3ba187e3a8db4bb6d301a4e2d6..954c451ed31260d285480dc96b04e8dbacd7562d 100644
--- a/base/file_util_proxy.h
+++ b/base/file_util_proxy.h
@@ -17,7 +17,7 @@
 
 namespace base {
 
-class MessageLoopProxy;
+class TaskRunner;
 class Time;
 
 // This class provides asynchronous access to common file routines.
@@ -59,7 +59,7 @@ class BASE_EXPORT FileUtilProxy {
   // callback. If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to
   // create a new file at the given |file_path| and calls back with
   // PLATFORM_FILE_ERROR_FILE_EXISTS if the |file_path| already exists.
-  static bool CreateOrOpen(scoped_refptr<MessageLoopProxy> message_loop_proxy,
+  static bool CreateOrOpen(TaskRunner* task_runner,
                            const FilePath& file_path,
                            int file_flags,
                            const CreateOrOpenCallback& callback);
@@ -73,44 +73,44 @@ class BASE_EXPORT FileUtilProxy {
   // Set |additional_file_flags| to 0 for synchronous writes and set to
   // base::PLATFORM_FILE_ASYNC to support asynchronous file operations.
   static bool CreateTemporary(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       int additional_file_flags,
       const CreateTemporaryCallback& callback);
 
   // Close the given file handle.
-  static bool Close(scoped_refptr<MessageLoopProxy> message_loop_proxy,
+  static bool Close(TaskRunner* task_runner,
                     PlatformFile,
                     const StatusCallback& callback);
 
   // Retrieves the information about a file. It is invalid to pass a null
   // callback.
   static bool GetFileInfo(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const FilePath& file_path,
       const GetFileInfoCallback& callback);
 
   static bool GetFileInfoFromPlatformFile(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       const GetFileInfoCallback& callback);
 
   // Deletes a file or a directory.
   // It is an error to delete a non-empty directory with recursive=false.
-  static bool Delete(scoped_refptr<MessageLoopProxy> message_loop_proxy,
+  static bool Delete(TaskRunner* task_runner,
                      const FilePath& file_path,
                      bool recursive,
                      const StatusCallback& callback);
 
   // Deletes a directory and all of its contents.
   static bool RecursiveDelete(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const FilePath& file_path,
       const StatusCallback& callback);
 
   // Reads from a file. On success, the file pointer is moved to position
   // |offset + bytes_to_read| in the file. The callback can be null.
   static bool Read(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       int64 offset,
       int bytes_to_read,
@@ -121,7 +121,7 @@ class BASE_EXPORT FileUtilProxy {
   // |offset + bytes_to_write| in the file. The callback can be null.
   // |bytes_to_write| must be greater than zero.
   static bool Write(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       int64 offset,
       const char* buffer,
@@ -130,7 +130,7 @@ class BASE_EXPORT FileUtilProxy {
 
   // Touches a file. The callback can be null.
   static bool Touch(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       const Time& last_access_time,
       const Time& last_modified_time,
@@ -138,7 +138,7 @@ class BASE_EXPORT FileUtilProxy {
 
   // Touches a file. The callback can be null.
   static bool Touch(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const FilePath& file_path,
       const Time& last_access_time,
       const Time& last_modified_time,
@@ -148,7 +148,7 @@ class BASE_EXPORT FileUtilProxy {
   // current length of the file, the file will be extended with zeroes.
   // The callback can be null.
   static bool Truncate(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       int64 length,
       const StatusCallback& callback);
@@ -157,32 +157,32 @@ class BASE_EXPORT FileUtilProxy {
   // current length of the file, the file will be extended with zeroes.
   // The callback can be null.
   static bool Truncate(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const FilePath& path,
       int64 length,
       const StatusCallback& callback);
 
   // Flushes a file. The callback can be null.
   static bool Flush(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       PlatformFile file,
       const StatusCallback& callback);
 
   // Relay helpers.
   static bool RelayFileTask(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const tracked_objects::Location& from_here,
       const FileTask& task,
       const StatusCallback& callback);
 
   static bool RelayCreateOrOpen(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const CreateOrOpenTask& open_task,
       const CloseTask& close_task,
       const CreateOrOpenCallback& callback);
 
   static bool RelayClose(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
+      TaskRunner* task_runner,
       const CloseTask& close_task,
       PlatformFile,
       const StatusCallback& callback);