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

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index 59b664e24d2a301768417a7be97f4ca9a2c82a20..abebba74d0243ed09f218e36d21cdf6229ec8205 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -77,7 +77,6 @@ import org.chromium.net.NetworkChangeNotifier;
 import org.chromium.ui.base.ActivityWindowAndroid;
 import org.chromium.ui.base.PageTransition;
 import org.chromium.ui.base.ViewAndroidDelegate;
-import org.chromium.ui.base.ViewRoot;
 import org.chromium.ui.base.WindowAndroid;
 import org.chromium.ui.display.DisplayAndroid.DisplayAndroidObserver;
 
@@ -362,8 +361,6 @@ public class AwContents implements SmartClipProvider, PostMessageSender.PostMess
 
     private static String sCurrentLocales = "";
 
-    private ViewRoot mViewRoot;
-
     private static final class AwContentsDestroyRunnable implements Runnable {
         private final long mNativeAwContents;
         // Hold onto a reference to the window (via its wrapper), so that it is not destroyed
@@ -1203,7 +1200,6 @@ public class AwContents implements SmartClipProvider, PostMessageSender.PostMess
             mNativeAwContents = 0;
             mWebContents = null;
             mNavigationController = null;
-            mViewRoot = null;
 
             mCleanupReference.cleanupNow();
             mCleanupReference = null;
@@ -3207,7 +3203,7 @@ public class AwContents implements SmartClipProvider, PostMessageSender.PostMess
             // to enter fixedLayoutSize mode is sent before the first resize
             // update.
             mLayoutSizer.onSizeChanged(w, h, ow, oh);
-            getViewRoot().onPhysicalBackingSizeChanged(w, h);
+            mContentViewCore.onPhysicalBackingSizeChanged(w, h);
             mContentViewCore.onSizeChanged(w, h, ow, oh);
             nativeOnSizeChanged(mNativeAwContents, w, h, ow, oh);
         }
@@ -3283,13 +3279,6 @@ public class AwContents implements SmartClipProvider, PostMessageSender.PostMess
         }
     }
 
-    private ViewRoot getViewRoot() {
-        if (mViewRoot == null) {
-            mViewRoot = nativeGetViewRoot(mNativeAwContents);
-        }
-        return mViewRoot;
-    }
-
     // Return true if the GeolocationPermissionAPI should be used.
     @CalledByNative
     private boolean useLegacyGeolocationPermissionAPI() {
@@ -3393,5 +3382,4 @@ public class AwContents implements SmartClipProvider, PostMessageSender.PostMess
 
     private native void nativeGrantFileSchemeAccesstoChildProcess(long nativeAwContents);
     private native void nativeResumeLoadingCreatedPopupWebContents(long nativeAwContents);
-    private native ViewRoot nativeGetViewRoot(long nativeAwContents);
 }