bug 1030738 - NullPointerException when getting action bar r=rnewman

mobile/android/base/preferences/GeckoPreferenceFragment.java

@@ -122,9 +122,11 @@ public class GeckoPreferenceFragment extends PreferenceFragment {
 
         if (Build.VERSION.SDK_INT >= 14) {
             final ActionBar actionBar = activity.getActionBar();
+            if (actionBar != null) {
                 actionBar.setTitle(newTitle);
             }
         }
+    }
 
     @Override
     public void onResume() {

mobile/android/base/preferences/GeckoPreferences.java

@@ -140,10 +140,12 @@ OnSharedPreferenceChangeListener
                 Log.v(LOGTAG, "Setting action bar title to " + newTitle);
 
                 final ActionBar actionBar = getActionBar();
+                if (actionBar != null) {
                     actionBar.setTitle(newTitle);
                 }
             }
         }
+    }
 
     private void updateTitle(String newTitle) {
         if (newTitle != null) {
@@ -360,8 +362,10 @@ OnSharedPreferenceChangeListener
 
         if (Build.VERSION.SDK_INT >= 14) {
             final ActionBar actionBar = getActionBar();
+            if (actionBar != null) {
                 actionBar.setHomeButtonEnabled(true);
             }
+        }
 
         // N.B., if we ever need to redisplay the locale selection UI without
         // just finishing and recreating the activity, right here we'll need to