Adding java implementation for Geolocation

base/android/java/src/org/chromium/base/ThreadUtils.java

Index: base/android/java/src/org/chromium/base/ThreadUtils.java
diff --git a/base/android/java/src/org/chromium/base/ThreadUtils.java b/base/android/java/src/org/chromium/base/ThreadUtils.java
index b827a0b6c0b49914cebdcfe8f357fec32fc2b915..70232c4ea139b2f1fba8d9145fb0d25f7e5042c5 100644
--- a/base/android/java/src/org/chromium/base/ThreadUtils.java
+++ b/base/android/java/src/org/chromium/base/ThreadUtils.java
@@ -123,6 +123,16 @@ public class ThreadUtils {
     }
 
     /**
+     * Post the supplied Runnable to run on the main thread. The method will
+     * not block, even if called on the UI thread.
+     *
+     * @param task The Runnable to run
+     */
+    public static void postOnUiThread(Runnable r) {
+        LazyHolder.sUiThreadHandler.post(r);
+    }
+
+    /**
      * Asserts that the current thread is running on the main thread.
      */
     public static void assertOnUiThread() {