Support setting mouse cursor icon in Android N.

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java
index da51d973acb943aace83cdc495984b961b76fbff..ec03039b47fa16285f80fa62f12cd8bc96e49103 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabBottomBarDelegate.java
@@ -8,7 +8,9 @@ import android.app.PendingIntent;
 import android.app.PendingIntent.CanceledException;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Build;
 import android.support.customtabs.CustomTabsIntent;
+import android.view.PointerIcon;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLayoutChangeListener;
@@ -155,6 +157,12 @@ class CustomTabBottomBarDelegate implements FullscreenListener {
         if (mBottomBarView == null) {
             ViewStub bottomBarStub = ((ViewStub) mActivity.findViewById(R.id.bottombar_stub));
             mBottomBarView = (ViewGroup) bottomBarStub.inflate();
+
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                PointerIcon icon = PointerIcon.getSystemIcon(
+                        mBottomBarView.getContext(), PointerIcon.TYPE_ARROW);
+                mBottomBarView.setPointerIcon(icon);
+            }
         }
         return mBottomBarView;
     }