Protect against X-O frame access that crashes some browsers

README.md

@@ -202,6 +202,7 @@ Or via ``gulp``:
 
 * v0.1.0 - 2015-12-10: Initial version
 * v0.1.1 - 2016-04-04: `getCompressedUserTiming()` gathers Measures that end after the specified `from`
+* v0.1.2 - 2016-04-04: Protect against X-O frame access that crashes some browsers
 
 ## Thanks
 

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "usertiming-compression",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "homepage": "https://github.com/nicjansma/usertiming-compression.js",
   "authors": [
     "Nic Jansma <[email protected]>"

package.json

@@ -3,7 +3,7 @@
   "description": "UserTiming compression and decompression",
   "main": "./src/usertiming-compression",
   "author": "Nic Jansma",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "repository": {
     "type": "git",
     "url": "http://github.com/nicjansma/usertiming-compression.js.git"

src/usertiming-compression.js

@@ -90,6 +90,13 @@
         }
 
         try {
+            // Try to access location.href first to trigger any Cross-Origin
+            // warnings.  There's also a bug in Chrome ~48 that might cause
+            // the browser to crash if accessing X-O frame.performance.
+            // https://code.google.com/p/chromium/issues/detail?id=585871
+            // This variable is not otherwise used.
+            var frameLoc = frame.location && frame.location.href;
+
             if (!("performance" in frame) ||
                 !frame.performance ||
                 !frame.performance.getEntriesByType) {