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 bda984042ad86895e6f2b6c56cda90e16604342f..7982f39b96720e08e74eae6000a6b9debbe1d0fb 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;
@@ -116,6 +117,18 @@ public final class ContentShellTestCommon {
         }, WAIT_FOR_ACTIVE_SHELL_LOADING_TIMEOUT, CriteriaHelper.DEFAULT_POLLING_INTERVAL);
     }
 
+    OnCursorUpdateHelper getOnCursorUpdateHelper() throws ExecutionException {
+        return ThreadUtils
+                .runOnUiThreadBlocking(new Callable<Shell>() {
+                    @Override
+                    public Shell call() {
+                        return mCallback.getActivityForTestCommon().getActiveShell();
+                    }
+                })
+                .getViewAndroidDelegate()

[boliu, 2017/06/02 15:54:41]

these two should be on UI thread as well

[jaebaek, 2017/06/03 14:24:10]

Done.

+                .getOnCursorUpdateHelper();
+    }
+
     ContentViewCore getContentViewCore() {
         return mCallback.getActivityForTestCommon().getActiveShell().getContentViewCore();
     }