Make new TaskRunner, SequencedTaskRunner, and SingleThreadTaskRunner interfaces

base/executor_helpers.h

Index: base/executor_helpers.h
diff --git a/base/message_loop_helpers.h b/base/executor_helpers.h
similarity index 69%
copy from base/message_loop_helpers.h
copy to base/executor_helpers.h
index 9aeaad72fb05822b8a708aa6f5ca926f63f9d48f..804befae9de3251068305e1786e912f98d63e52d 100644
--- a/base/message_loop_helpers.h
+++ b/base/executor_helpers.h
@@ -1,9 +1,9 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BASE_MESSAGE_LOOP_HELPERS_H_
-#define BASE_MESSAGE_LOOP_HELPERS_H_
+#ifndef BASE_EXECUTOR_HELPERS_H_
+#define BASE_EXECUTOR_HELPERS_H_
 #pragma once
 
 #include "base/basictypes.h"
@@ -23,7 +23,7 @@ template <class T, class R> class ReleaseHelperInternal;
 // function signature while still remembering it so we can call the correct
 // destructor/release function.
 // We use this trick so we don't need to include bind.h in a header file like
-// message_loop.h. We also wrap the helpers in a templated class to make it
+// executor.h. We also wrap the helpers in a templated class to make it
 // easier for users of DeleteSoon to declare the helper as a friend.
 template <class T>
 class DeleteHelper {
@@ -51,11 +51,11 @@ class ReleaseHelper {
 
 namespace subtle {
 
-// An internal MessageLoop-like class helper for DeleteHelper and ReleaseHelper.
+// An internal Executor-like class helper for DeleteHelper and ReleaseHelper.
 // We don't want to expose the Do*() functions directly directly since the void*
 // argument makes it possible to pass/ an object of the wrong type to delete.
 // Instead, we force callers to go through these internal helpers for type
-// safety. MessageLoop-like classes which expose DeleteSoon or ReleaseSoon
+// safety. Executor-like classes which expose DeleteSoon or ReleaseSoon
 // methods should friend the appropriate helper and implement a corresponding
 // *Internal method with the following signature:
 // bool(const tracked_objects::Location&,
@@ -66,14 +66,14 @@ namespace subtle {
 template <class T, class ReturnType>
 class DeleteHelperInternal {
  public:
-  template <class MessageLoopType>
-  static ReturnType DeleteOnMessageLoop(
-      MessageLoopType* message_loop,
+  template <class ExecutorType>
+  static ReturnType DeleteOnExecutor(

[darin (slow to review), 2012/01/25 07:25:56]

I wonder if "From" or "Via" wouldn't be a better that "On" here.

[akalin, 2012/01/25 23:56:07]

Went with "Via"

+      ExecutorType* executor,
       const tracked_objects::Location& from_here,
       const T* object) {
-    return message_loop->DeleteSoonInternal(from_here,
-                                            &DeleteHelper<T>::DoDelete,
-                                            object);
+    return executor->DeleteSoonInternal(from_here,
+                                        &DeleteHelper<T>::DoDelete,
+                                        object);
   }
 
  private:
@@ -83,14 +83,14 @@ class DeleteHelperInternal {
 template <class T, class ReturnType>
 class ReleaseHelperInternal {
  public:
-  template <class MessageLoopType>
-  static ReturnType ReleaseOnMessageLoop(
-      MessageLoopType* message_loop,
+  template <class ExecutorType>
+  static ReturnType ReleaseOnExecutor(
+      ExecutorType* executor,
       const tracked_objects::Location& from_here,
       const T* object) {
-    return message_loop->ReleaseSoonInternal(from_here,
-                                             &ReleaseHelper<T>::DoRelease,
-                                             object);
+    return executor->ReleaseSoonInternal(from_here,
+                                         &ReleaseHelper<T>::DoRelease,
+                                         object);
   }
 
  private:
@@ -101,4 +101,4 @@ class ReleaseHelperInternal {
 
 }  // namespace base
 
-#endif  // BASE_MESSAGE_LOOP_HELPERS_H_
+#endif  // BASE_EXECUTOR_HELPERS_H_