Revert "ViewRoot class for event forwarding on Android"

ui/android/view_root.h

Index: ui/android/view_root.h
diff --git a/ui/android/view_root.h b/ui/android/view_root.h
deleted file mode 100644
index 49007fa4c479af42eaf0b190ac04cd20a9226192..0000000000000000000000000000000000000000
--- a/ui/android/view_root.h
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2017 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.
-
-#ifndef UI_ANDROID_VIEW_ROOT_H_
-#define UI_ANDROID_VIEW_ROOT_H_
-
-#include <jni.h>
-
-#include "base/android/scoped_java_ref.h"
-#include "ui/android/ui_android_export.h"
-#include "ui/android/view_android.h"
-
-namespace ui {
-
-// ViewRoot is the root of a ViewAndroid tree.
-// TODO(jinsukkim): Hook this up to UI event forwarding flow and
-//     substitute WindowAndroid. See https://crbug.com/671401
-class UI_ANDROID_EXPORT ViewRoot : public ViewAndroid {
- public:
-  explicit ViewRoot(jlong window_android_ptr);
-
-  // ViewAndroid overrides.
-  WindowAndroid* GetWindowAndroid() const override;
-  ViewAndroid* GetViewRoot() override;
-
-  void Destroy(JNIEnv* env,
-               const base::android::JavaParamRef<jobject>& obj);
-
-  jboolean OnTouchEvent(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
-      const base::android::JavaParamRef<jobject>& motion_event,
-      jlong time_ms,
-      jint android_action,
-      jint pointer_count,
-      jint history_size,
-      jint action_index,
-      jfloat pos_x_0,
-      jfloat pos_y_0,
-      jfloat pos_x_1,
-      jfloat pos_y_1,
-      jint pointer_id_0,
-      jint pointer_id_1,
-      jfloat touch_major_0,
-      jfloat touch_major_1,
-      jfloat touch_minor_0,
-      jfloat touch_minor_1,
-      jfloat orientation_0,
-      jfloat orientation_1,
-      jfloat tilt_0,
-      jfloat tilt_1,
-      jfloat raw_pos_x,
-      jfloat raw_pos_y,
-      jint android_tool_type_0,
-      jint android_tool_type_1,
-      jint android_button_state,
-      jint android_meta_state,
-      jboolean is_touch_handle_event);
-
- private:
-  WindowAndroid* window_;
-
-  DISALLOW_COPY_AND_ASSIGN(ViewRoot);
-};
-
-bool RegisterViewRoot(JNIEnv* env);
-
-}  // namespace ui
-
-#endif  // UI_ANDROID_VIEW_ROOT_H_