Makes Screen functions take a const gfx::NativeView

blimp/engine/app/ui/blimp_screen.cc

 // Copyright 2015 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 "blimp/engine/app/ui/blimp_screen.h"
 
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/display/display_observer.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 49 matching lines @@
 
 int BlimpScreen::GetNumDisplays() const {
   return kNumDisplays;
 }
 
 std::vector<display::Display> BlimpScreen::GetAllDisplays() const {
   return std::vector<display::Display>(1, display_);
 }
 
 display::Display BlimpScreen::GetDisplayNearestWindow(
-    gfx::NativeWindow window) const {
+    const gfx::NativeWindow window) const {
   return display_;
 }
 
 display::Display BlimpScreen::GetDisplayNearestPoint(
     const gfx::Point& point) const {
   return display_;
 }
 
 display::Display BlimpScreen::GetDisplayMatching(
     const gfx::Rect& match_rect) const {
   return display_;
 }
 
 display::Display BlimpScreen::GetPrimaryDisplay() const {
   return display_;
 }
 
 void BlimpScreen::AddObserver(display::DisplayObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void BlimpScreen::RemoveObserver(display::DisplayObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace engine
 }  // namespace blimp