[Android] Fix geolocation infobar tests

chrome/android/javatests/src/org/chromium/chrome/browser/location/LocationSettingsTestUtil.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/location/LocationSettingsTestUtil.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/location/LocationSettingsTestUtil.java b/chrome/android/javatests/src/org/chromium/chrome/browser/location/LocationSettingsTestUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..a2b5ced25f0bccd196ce7d7ceae6da07654c7904
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/location/LocationSettingsTestUtil.java
@@ -0,0 +1,31 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.location;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.preferences.LocationSettings;
+
+/**
+ * Methods for testing location-related features.
+ */
+public class LocationSettingsTestUtil {
+
+    /**
+     * Mocks the system location setting as either enabled or disabled. Can be called on any thread.
+     */
+    public static void setSystemLocationSettingEnabled(final boolean enabled) {
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                LocationSettings.setInstanceForTesting(new LocationSettings(null) {
+                    @Override
+                    public boolean isSystemLocationSettingEnabled() {
+                        return enabled;
+                    }
+                });
+            }
+        });
+    }
+}