Support setting mouse cursor icon in Android N.

chrome/android/java/src/org/chromium/chrome/browser/widget/emptybackground/EmptyBackgroundViewWrapper.java

 // Copyright 2015 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.chrome.browser.widget.emptybackground;
 
 import android.app.Activity;
+import android.os.Build;
+import android.view.PointerIcon;
 import android.view.View;
 import android.view.View.OnAttachStateChangeListener;
 import android.view.ViewStub;
 
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.appmenu.AppMenuHandler;
 import org.chromium.chrome.browser.compositor.layouts.OverviewModeBehavior;
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.EmptyTabModelObserver;
@@ skipping 112 matching lines @@
         mBackgroundView.addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
             @Override
             public void onViewDetachedFromWindow(View v) {
                 uninitialize();
             }
 
             @Override
             public void onViewAttachedToWindow(View v) {
             }
         });
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            PointerIcon icon =
+                    PointerIcon.getSystemIcon(mBackgroundView.getContext(), PointerIcon.TYPE_ARROW);
+            mBackgroundView.setPointerIcon(icon);
+        }
     }
 
     private void updateEmptyContainerState() {
         boolean showEmptyBackground = shouldShowEmptyContainer();
         if (showEmptyBackground) {
             inflateViewIfNecessary();
         }
 
         if (mBackgroundView != null) {
             mBackgroundView.setEmptyContainerState(showEmptyBackground);
@@ skipping 10 matching lines @@
         boolean incognitoSelected = mTabModelSelector.isIncognitoSelected();
 
         // Only show the empty container if:
         // 1. There are no tabs in the normal TabModel AND
         // 2. Overview mode is not showing AND
         // 3. We're in the normal TabModel OR there are no tabs present in either model
         return model.getCount() == 0 && !mOverviewModeBehavior.overviewVisible()
                 && (!incognitoSelected || isIncognitoEmpty);
     }
 }