Introduce ViewRoot forwarding input/view events to native

chrome/browser/android/vr_shell/vr_compositor.cc

Index: chrome/browser/android/vr_shell/vr_compositor.cc
diff --git a/chrome/browser/android/vr_shell/vr_compositor.cc b/chrome/browser/android/vr_shell/vr_compositor.cc
index 882236f53d8c54bc360732be0577f7ce87a000b4..3d3ce4509aeee9a2ea55cd3b8c5042fcf84c973a 100644
--- a/chrome/browser/android/vr_shell/vr_compositor.cc
+++ b/chrome/browser/android/vr_shell/vr_compositor.cc
@@ -8,14 +8,14 @@
 #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);
 }