Remove TODO in PPAPI input event interface files.

ppapi/cpp/input_event.h

Index: ppapi/cpp/input_event.h
diff --git a/ppapi/cpp/input_event.h b/ppapi/cpp/input_event.h
index 195ac08f3f14ac4116f68e33360e8fd1b0d28369..11ca96ef710ec5a9ab3ebe191d3a91900b974e20 100644
--- a/ppapi/cpp/input_event.h
+++ b/ppapi/cpp/input_event.h
@@ -1,4 +1,4 @@
-// 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.
 
@@ -159,10 +159,6 @@ class MouseInputEvent : public InputEvent {
   ///
   /// @return The change in position of the mouse, relative to the previous
   /// position.
-  ///
-  /// TODO(yzshen): This feature hasn't been fully supported yet. For now,
-  /// movement information is provided only if the mouse is locked. If the mouse
-  /// is not locked, the returned value is (0, 0).
   Point GetMovement() const;
 };