Fix views compilation on Linux with toolkit_views=1.

ui/views/bubble/bubble_delegate.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_VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
 #pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/animation/animation_delegate.h"
@@ skipping 54 matching lines @@
   void set_arrow_location(BubbleBorder::ArrowLocation arrow_location) {
       arrow_location_ = arrow_location;
   }
 
   SkColor color() const { return color_; }
   void set_color(SkColor color) { color_ = color; }
 
   int margin() const { return margin_; }
   void set_margin(int margin) { margin_ = margin; }
 
-  gfx::NativeWindow parent_window() const { return parent_window_; }
-  void set_parent_window(gfx::NativeWindow window) { parent_window_ = window; }
+  gfx::NativeView parent_window() const { return parent_window_; }
+  void set_parent_window(gfx::NativeView window) { parent_window_ = window; }
 
   bool use_focusless() const { return use_focusless_; }
   void set_use_focusless(bool use_focusless) {
     use_focusless_ = use_focusless;
   }
 
   // Get the arrow's anchor rect in screen space.
   virtual gfx::Rect GetAnchorRect();
 
   // Show the bubble's widget (and |border_widget_| on Windows).
@@ skipping 62 matching lines @@
   int original_opacity_;
 
   // The widget hosting the border for this bubble (non-Aura Windows only).
   Widget* border_widget_;
 
   // Create a popup window for focusless bubbles on Linux/ChromeOS.
   // These bubbles are not interactive and should not gain focus.
   bool use_focusless_;
 
   // Parent native window of the bubble.
-  gfx::NativeWindow parent_window_;
+  gfx::NativeView parent_window_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleDelegateView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_DELEGATE_H_