Introduce ViewRoot forwarding input/view events to native

chrome/browser/android/vr_shell/vr_shell.cc

Index: chrome/browser/android/vr_shell/vr_shell.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell.cc b/chrome/browser/android/vr_shell/vr_shell.cc
index 2704107f39f8ccb77ce9870fe9049ad93e3da1ef..b824c141dd47761b75fe71eee5e4796e77e9c735 100644
--- a/chrome/browser/android/vr_shell/vr_shell.cc
+++ b/chrome/browser/android/vr_shell/vr_shell.cc
@@ -102,18 +102,18 @@ class GLThread : public base::Thread {
 VrShell::VrShell(JNIEnv* env,
                  jobject obj,
                  content::WebContents* main_contents,
-                 ui::WindowAndroid* content_window,
+                 ui::ViewRoot* content_view_root,
                  content::WebContents* ui_contents,
-                 ui::WindowAndroid* ui_window,
+                 ui::ViewRoot* ui_view_root,
                  bool for_web_vr,
                  VrShellDelegate* delegate,
                  gvr_context* gvr_api,
                  bool reprojected_rendering)
     : WebContentsObserver(ui_contents),
       main_contents_(main_contents),
-      content_compositor_(new VrCompositor(content_window, false)),
+      content_compositor_(new VrCompositor(content_view_root, false)),
       ui_contents_(ui_contents),
-      ui_compositor_(new VrCompositor(ui_window, true)),
+      ui_compositor_(new VrCompositor(ui_view_root, true)),
       delegate_(delegate),
       metrics_helper_(new VrMetricsHelper(main_contents_)),
       main_thread_task_runner_(base::ThreadTaskRunnerHandle::Get()),
@@ -474,16 +474,16 @@ void VrShell::SetUiCssSize(float width, float height, float dpr) {
 
 jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj,
            const JavaParamRef<jobject>& content_web_contents,
-           jlong content_window_android,
+           jlong content_view_root,
            const JavaParamRef<jobject>& ui_web_contents,
-           jlong ui_window_android, jboolean for_web_vr,
+           jlong ui_view_root, jboolean for_web_vr,
            const base::android::JavaParamRef<jobject>& delegate,
            jlong gvr_api, jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, content::WebContents::FromJavaWebContents(content_web_contents),
-      reinterpret_cast<ui::WindowAndroid*>(content_window_android),
+      reinterpret_cast<ui::ViewRoot*>(content_view_root),
       content::WebContents::FromJavaWebContents(ui_web_contents),
-      reinterpret_cast<ui::WindowAndroid*>(ui_window_android),
+      reinterpret_cast<ui::ViewRoot*>(ui_view_root),
       for_web_vr, VrShellDelegate::GetNativeDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }