[Sync] Moved down comments directly following copyright.

components/sync/base/weak_handle.h

 // Copyright 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 COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_
+#define COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_
+
+#include <cstddef>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
+
 // Weak handles provides a way to refer to weak pointers from another
 // thread.  This is useful because it is not safe to reference a weak
 // pointer from a thread other than the thread on which it was
 // created.
 //
 // Weak handles can be passed across threads, so for example, you can
 // use them to do the "real" work on one thread and get notified on
 // another thread:
 //
 // class FooIOWorker {
@@ skipping 22 matching lines @@
 //     SpawnFooIOWorkerOnIOThread(base::MakeWeakHandle(AsWeakPtr()));
 //   }
 //
 //   /* Will always be called on the correct thread, and only if this
 //      object hasn't been destroyed. */
 //   void OnIOStart() { DCHECK(CalledOnValidThread(); ... }
 //   void OnIOEvent(IOEvent e) { DCHECK(CalledOnValidThread(); ... }
 //   void OnIOError(IOError err) { DCHECK(CalledOnValidThread(); ... }
 // };
 
-#ifndef COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_
-#define COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_
-
-#include <cstddef>
-#include <utility>
-
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/gtest_prod_util.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/single_thread_task_runner.h"
-
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace syncer {
 
 template <typename T>
 class WeakHandle;
 
 namespace internal {
@@ skipping 121 matching lines @@
 
 // Makes a WeakHandle from a WeakPtr.
 template <typename T>
 WeakHandle<T> MakeWeakHandle(const base::WeakPtr<T>& ptr) {
   return WeakHandle<T>(ptr);
 }
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_