x11: Simplify some more event-rewrite code.

ui/aura/window_tree_host.cc

 // Copyright (c) 2013 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.
 
 #include "ui/aura/window_tree_host.h"
 
 #include "base/debug/trace_event.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window_transformer.h"
@@ skipping 272 matching lines @@
   UpdateRootWindowSize(layer_size);
   FOR_EACH_OBSERVER(WindowTreeHostObserver, observers_, OnHostResized(this));
   delegate_->OnHostResized(layer_size);
 }
 
 void WindowTreeHost::OnHostCloseRequested() {
   FOR_EACH_OBSERVER(WindowTreeHostObserver, observers_,
                     OnHostCloseRequested(this));
 }
 
-void WindowTreeHost::OnKeyboardMappingChanged() {
-  FOR_EACH_OBSERVER(WindowTreeHostObserver, observers_,
-                    OnKeyboardMappingChanged(this));
-}
-
 void WindowTreeHost::MoveCursorToInternal(const gfx::Point& root_location,
                                           const gfx::Point& host_location) {
   MoveCursorToNative(host_location);
   client::CursorClient* cursor_client = client::GetCursorClient(window());
   if (cursor_client) {
     const gfx::Display& display =
         gfx::Screen::GetScreenFor(window())->GetDisplayNearestWindow(window());
     cursor_client->SetDisplay(display);
   }
   delegate_->OnCursorMovedToRootLocation(root_location);
 }
 
 #if defined(OS_ANDROID)
 // static
 WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
   // This is only hit for tests and ash, right now these aren't an issue so
   // adding the CHECK.
   // TODO(sky): decide if we want a factory.
   CHECK(false);
   return NULL;
 }
 #endif
 
 }  // namespace aura