aura: Remove unused Window::Blur().

ui/aura/window.cc

 // 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.
 
 #include "ui/aura/window.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 657 matching lines @@
   }
   return topmost_window_with_delegate;
 }
 
 void Window::Focus() {
   client::FocusClient* client = client::GetFocusClient(this);
   DCHECK(client);
   client->FocusWindow(this);
 }
 
-void Window::Blur() {
-  client::FocusClient* client = client::GetFocusClient(this);
-  DCHECK(client);
-  client->FocusWindow(NULL);
-}
-
 bool Window::HasFocus() const {
   client::FocusClient* client = client::GetFocusClient(this);
   return client && client->GetFocusedWindow() == this;
 }
 
 bool Window::CanFocus() const {
   if (IsRootWindow())
     return IsVisible();
 
   // NOTE: as part of focusing the window the ActivationClient may make the
@@ skipping 713 matching lines @@
       return window;
     if (offset)
       *offset += window->bounds().OffsetFromOrigin();
   }
   if (offset)
     *offset = gfx::Vector2d();
   return NULL;
 }
 
 }  // namespace aura