Fix crashes on iOS related to using window.performance and reading window.location.href in a UIWebV…

java/org/chromium/distiller/DomUtil.java

Index: java/org/chromium/distiller/DomUtil.java
diff --git a/java/org/chromium/distiller/DomUtil.java b/java/org/chromium/distiller/DomUtil.java
index 91aabde47318504a08c1e51fc2aea35a7230f3e4..d0bcb1bfd7330c1cc8c56be59fdbc6320918284f 100644
--- a/java/org/chromium/distiller/DomUtil.java
+++ b/java/org/chromium/distiller/DomUtil.java
@@ -112,8 +112,9 @@ public class DomUtil {
     }-*/;
 
     public static native double getTime() /*-{
-        // window.performance is unavailable in Gwt's dev environment.
-        if (window.performance) {
+        // window.performance is unavailable in Gwt's dev environment and even referencing it on iOS
+        // causes a crash.
+        if ((typeof distiller_on_ios === 'undefined' || !distiller_on_ios) && window.performance) {
           return window.performance.now();
         }
         return Date.now();