Support setting mouse cursor icon in Android N.

android_webview/java/src/org/chromium/android_webview/AwViewAndroidDelegate.java

 // Copyright 2016 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.
 
 package org.chromium.android_webview;
 
+import android.os.Build;
+import android.view.PointerIcon;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
 import org.chromium.base.VisibleForTesting;
 import org.chromium.content.browser.RenderCoordinates;
 import org.chromium.ui.base.ViewAndroidDelegate;
 import org.chromium.ui.display.DisplayAndroid;
 
 import java.util.LinkedHashMap;
@@ skipping 127 matching lines @@
 
     @Override
     public void onBackgroundColorChanged(int color) {
         mContentsClient.onBackgroundColorChanged(color);
     }
 
     @Override
     public ViewGroup getContainerView() {
         return mContainerView;
     }
+
+    @Override
+    public void updatePointerIcon(PointerIcon icon) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            getContainerView().setPointerIcon(icon);
+        }
+    }
 }