bump protocol

Author: devtools-bot

_data/tot/protocol.json

@@ -2552,7 +2552,9 @@
                                 "no-referrer",
                                 "origin",
                                 "origin-when-cross-origin",
-                                "no-referrer-when-downgrade-origin-when-cross-origin"
+                                "same-origin",
+                                "strict-origin",
+                                "strict-origin-when-cross-origin"
                             ],
                             "description": "The referrer policy of the request, as defined in https://www.w3.org/TR/referrer-policy/"
                         },

_versions/tot.html

@@ -8,7 +8,7 @@ <h2 class="heading">latest (tip-of-tree)</h2>
 
 <h5 browser>Latest <a
    href="https://chromium.googlesource.com/chromium/src/+log/master/third_party/WebKit/Source/core/inspector/browser_protocol.json">browser_protocol.json</a> version updated:</h5>
-<code browser>Date:   Mon Jun 12 16:15:23 2017 -0700
+<code browser>Date:   Tue Jun 13 16:15:25 2017 -0700
 </code>
 
 <h5 js>Latest <a