SameSite: Teach devtools about the new 'samesite' syntax.

third_party/WebKit/Source/devtools/protocol.json

Index: third_party/WebKit/Source/devtools/protocol.json
diff --git a/third_party/WebKit/Source/devtools/protocol.json b/third_party/WebKit/Source/devtools/protocol.json
index 7fafc5499c34863e3c153ed94d96c6840c763609..d7ac072376c2af322da4ace2f6361377bef983ee 100644
--- a/third_party/WebKit/Source/devtools/protocol.json
+++ b/third_party/WebKit/Source/devtools/protocol.json
@@ -1404,7 +1404,8 @@
                     { "name": "size", "type": "integer", "description": "Cookie size." },
                     { "name": "httpOnly", "type": "boolean", "description": "True if cookie is http-only." },
                     { "name": "secure", "type": "boolean", "description": "True if cookie is secure." },
-                    { "name": "session", "type": "boolean", "description": "True in case of session cookie." }
+                    { "name": "session", "type": "boolean", "description": "True in case of session cookie." },
+                    { "name": "sameSite", "type": "string", "description": "'Lax', 'Strict', or the empty string." }

[dgozman, 2016/03/24 18:59:26]

Use enum:
"type": "string", "enum": ["Lax", "Strict", "Default"]

I think empty string is a bad value, let's have Default or something instead.
Or if it is actually optional in the spec, make this property optional as well.

                 ],
                 "hidden": true
             }