Fixed a crash in blimp toolbar

blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java

Index: blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java
diff --git a/blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java b/blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java
index 6213cb63c12cdd1e441b803686705b73e7c9e173..4b8f09883a356df62eced428ddf886f74cdd4ef3 100644
--- a/blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java
+++ b/blimp/client/app/android/java/src/org/chromium/blimp/BlimpRendererActivity.java
@@ -175,6 +175,10 @@ public class BlimpRendererActivity extends Activity
      * @param url URL to load. If null, browser loads a default page.
      */
     private void handleUrl(String url) {
+        // TODO(shaktisahu): On a slow device, this might happen. Load the correct URL once the
+        // toolbar loading is complete (crbug/601226)
+        if (mToolbar == null) return;
+
         if (url == null) {
             mToolbar.loadUrl("http://www.google.com/");
         } else {