Fix TabTest#testTabSecurityLevel that was failing

chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java

Index: chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java
diff --git a/chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java b/chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java
index ca1ced5bb6688348bac5cd7efe1df34f45358331..0ad30f893102fbf73a5a27779e8518956a835ae5 100644
--- a/chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java
+++ b/chrome/android/javatests_shell/src/org/chromium/chrome/browser/TabTest.java
@@ -102,6 +102,11 @@ public void run() {
     @SmallTest
     @Feature({"Tab"})
     public void testTabSecurityLevel() {
-        assertEquals(ConnectionSecurityHelperSecurityLevel.NONE, mTab.getSecurityLevel());
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                assertEquals(ConnectionSecurityHelperSecurityLevel.NONE, mTab.getSecurityLevel());
+            }
+        });
     }
 }