aura: Make RootWindow::DispatchKeyEvent drop unknown keys.

ui/aura/root_window.h

 // 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 UI_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 230 matching lines @@
 
   // Overridden from FocusManager:
   virtual void SetFocusedWindow(Window* window,
                                 const aura::Event* event) OVERRIDE;
   virtual Window* GetFocusedWindow() OVERRIDE;
   virtual bool IsFocusedWindow(const Window* window) const OVERRIDE;
 
   // Initializes the root window.
   void Init();
 
-  // We hold and aggregregate mouse drags as a way of throttling resizes
-  // when HoldMouseMoves() is called. The following methods are used to
-  // dispatch held and newly incoming mouse events, typically when an event
-  // other than a mouse drag needs dispatching or a matching ReleaseMouseMoves()
-  // is called.
+  // We hold and aggregate mouse drags as a way of throttling resizes when
+  // HoldMouseMoves() is called. The following methods are used to dispatch held
+  // and newly incoming mouse events, typically when an event other than a mouse
+  // drag needs dispatching or a matching ReleaseMouseMoves() is called.
   bool DispatchMouseEventImpl(MouseEvent* event);
   void DispatchHeldMouseMove();
 
   // Parses the switch describing the initial size for the host window and
   // returns bounds for the window.
   gfx::Rect GetInitialHostWindowBounds() const;
 
   // Posts a task to send synthesized mouse move event if there
   // is no a pending task.
   void PostMouseMoveEventAfterWindowChange();
@@ skipping 54 matching lines @@
   bool should_hold_mouse_moves_;
   bool release_mouse_moves_after_draw_;
   scoped_ptr<MouseEvent> held_mouse_move_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_