Introduce ViewRoot forwarding input/view events to native

chrome/browser/android/vr_shell/vr_compositor.cc

 // Copyright 2016 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 "chrome/browser/android/vr_shell/vr_compositor.h"
 
 #include "cc/layers/layer.h"
 #include "content/public/browser/android/compositor.h"
 #include "content/public/browser/web_contents.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "ui/android/window_android.h"
+#include "ui/android/view_android.h"
 
 namespace vr_shell {
 
-VrCompositor::VrCompositor(ui::WindowAndroid* window, bool transparent)
+VrCompositor::VrCompositor(ui::ViewRoot* view_root, bool transparent)
     : background_color_(SK_ColorWHITE),
       transparent_(transparent) {
-  compositor_.reset(content::Compositor::Create(this, window));
+  compositor_.reset(content::Compositor::Create(this, view_root));
   compositor_->SetHasTransparentBackground(transparent);
 }
 
 VrCompositor::~VrCompositor() {
   if (layer_) {
     layer_->SetBackgroundColor(background_color_);
     if (layer_parent_) {
       layer_parent_->AddChild(layer_);
     }
   }
@@ skipping 29 matching lines @@
   bounds_ = size;
   compositor_->SetWindowBounds(bounds_);
 }
 
 void VrCompositor::SurfaceChanged(jobject surface) {
   DCHECK(surface);
   compositor_->SetSurface(surface);
 }
 
 }  // namespace vr_shell