Revert "Introduce ViewRoot forwarding input/view events to native"

ui/android/BUILD.gn

Index: ui/android/BUILD.gn
diff --git a/ui/android/BUILD.gn b/ui/android/BUILD.gn
index 3ef92b17a8d230f73b1787a922375b99522298ae..5d72cdc074041cd8b4779604c74d6ee906d49d60 100644
--- a/ui/android/BUILD.gn
+++ b/ui/android/BUILD.gn
@@ -42,8 +42,6 @@ component("android") {
     "ui_android_jni_registrar.h",
     "view_android.cc",
     "view_android.h",
-    "view_client.cc",
-    "view_client.h",
     "window_android.cc",
     "window_android.h",
     "window_android_compositor.h",
@@ -83,7 +81,6 @@ generate_jni("ui_android_jni_headers") {
   sources = [
     "java/src/org/chromium/ui/OverscrollRefreshHandler.java",
     "java/src/org/chromium/ui/base/ViewAndroidDelegate.java",
-    "java/src/org/chromium/ui/base/ViewRoot.java",
     "java/src/org/chromium/ui/base/WindowAndroid.java",
     "java/src/org/chromium/ui/display/DisplayAndroidManager.java",
     "java/src/org/chromium/ui/resources/ResourceManager.java",
@@ -179,7 +176,6 @@ android_library("ui_java") {
     "java/src/org/chromium/ui/base/SelectFileDialog.java",
     "java/src/org/chromium/ui/base/TouchDevice.java",
     "java/src/org/chromium/ui/base/ViewAndroidDelegate.java",
-    "java/src/org/chromium/ui/base/ViewRoot.java",
     "java/src/org/chromium/ui/base/WindowAndroid.java",
     "java/src/org/chromium/ui/display/DisplayAndroid.java",
     "java/src/org/chromium/ui/display/DisplayAndroidManager.java",