Bug 998000 - Part 0: cancelEdit on back pressed, rather than stopEdit. r=lucasr

mobile/android/base/toolbar/BrowserToolbar.java

@@ -401,7 +401,7 @@ public class BrowserToolbar extends ThemedRelativeLayout
 
     public boolean onBackPressed() {
         if (isEditing()) {
-            stopEditing();
+            cancelEdit();
             return true;
         }