Bug 1399148 - Check we actually have an Editable before searching for a span. r=jwu

MozReview-Commit-ID: EiUO8wWSyLB

--HG--
extra : rebase_source : f1775d6082e43f3984086143081681f4d6a3e5bc

mobile/android/app/src/photon/java/org/mozilla/gecko/toolbar/ToolbarDisplayLayout.java

@@ -443,7 +443,7 @@ public class ToolbarDisplayLayout extends ThemedLinearLayout {
 
         final ForegroundColorSpan spanToCheck =
                 mTitle.isPrivateMode() ? mPrivateDomainColorSpan : mDomainColorSpan;
-        int domainEnd = text.getSpanEnd(spanToCheck);
+        final int domainEnd = text != null ? text.getSpanEnd(spanToCheck) : -1;
         if (domainEnd == -1) {
             // We're not showing a domain, just scroll to the start of the text.
             mTitleScroll.scrollTo(0, 0);