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..78c146f72d2a88958c2b0da9ebb55d3b276d3346 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
@@ -116,6 +116,13 @@ public final class ContentShellTestCommon {
         }, WAIT_FOR_ACTIVE_SHELL_LOADING_TIMEOUT, CriteriaHelper.DEFAULT_POLLING_INTERVAL);
     }
 
+    void setCursorUpdateCallback(Runnable callback) {
+        mCallback.getActivityForTestCommon()
+                .getActiveShell()

[boliu, 2017/05/31 16:30:03]

activity accessors should happen on ui thread. use
mCallback.runOnUiThreadForTestCommon

[jaebaek, 2017/06/01 06:20:56]

Ok, I will update it in that way, but have a question.
Why do other methods call "getActiveShell()" directly?

[boliu, 2017/06/01 16:14:50]

they are probably also unsafe, in theory

+                .getViewAndroidDelegate()
+                .setOnCursorUpdate(callback);
+    }
+
     ContentViewCore getContentViewCore() {
         return mCallback.getActivityForTestCommon().getActiveShell().getContentViewCore();
     }