Support setting mouse cursor icon in Android N.

content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java

Index: content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java
diff --git a/content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java b/content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java
index cac7590b74c4c478a1929e6597e92a9f8f3185d4..75ac4bc19d50a4c755433eba085e9f2af431c5f1 100644
--- a/content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java
+++ b/content/shell/android/javatests/src/org/chromium/content_shell_apk/ContentShellTestCommon.java
@@ -32,6 +32,7 @@ import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_shell.Shell;
+import org.chromium.content_shell.ShellViewAndroidDelegate.OnCursorUpdateHelper;
 
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
@@ -118,6 +119,18 @@ public final class ContentShellTestCommon {
         }, WAIT_FOR_ACTIVE_SHELL_LOADING_TIMEOUT, CriteriaHelper.DEFAULT_POLLING_INTERVAL);
     }
 
+    OnCursorUpdateHelper getOnCursorUpdateHelper() throws ExecutionException {
+        return ThreadUtils.runOnUiThreadBlocking(new Callable<OnCursorUpdateHelper>() {
+            @Override
+            public OnCursorUpdateHelper call() {
+                return mCallback.getActivityForTestCommon()
+                        .getActiveShell()
+                        .getViewAndroidDelegate()
+                        .getOnCursorUpdateHelper();
+            }
+        });
+    }
+
     ContentViewCore getContentViewCore() {
         return mCallback.getActivityForTestCommon().getActiveShell().getContentViewCore();
     }