Remove some pass-thrus on RootWindow API in favor of exposing the RootWindowHost again.

ash/wm/boot_splash_screen_chromeos.cc

 // Copyright 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 "ash/wm/boot_splash_screen_chromeos.h"
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/base/x/x11_util.h"
@@ skipping 17 matching lines @@
 
   // ui::LayerDelegate overrides:
   virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
     // It'd be safer to copy the area to a canvas in the constructor and then
     // copy from that canvas to this one here, but this appears to work (i.e. we
     // only call this before we draw our first frame) and it saves us an extra
     // copy.
     // TODO(derat): Instead of copying the data, use GLX_EXT_texture_from_pixmap
     // to create a zero-copy texture (when possible):
     // https://codereview.chromium.org/10543125
-    ui::CopyAreaToCanvas(root_window_->GetAcceleratedWidget(),
-        gfx::Rect(root_window_->GetHostOrigin(), root_window_->GetHostSize()),
-        gfx::Point(), canvas);
+    ui::CopyAreaToCanvas(root_window_->host()->GetAcceleratedWidget(),
+        root_window_->host()->GetBounds(), gfx::Point(), canvas);
   }
 
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
 
   virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE {
     return base::Closure();
   }
 
  private:
   aura::RootWindow* root_window_;  // not owned
@@ skipping 17 matching lines @@
 
 void BootSplashScreen::StartHideAnimation(base::TimeDelta duration) {
   ui::ScopedLayerAnimationSettings settings(layer_->GetAnimator());
   settings.SetTransitionDuration(duration);
   settings.SetPreemptionStrategy(ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
   layer_->SetOpacity(0.0f);
 }
 
 }  // namespace internal
 }  // namespace ash