Fix WebSocket to set first party for cookies

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 0237c178a90d10d43bb4150ec865e83db8984ccb..310d0912ef7e718f06233481e1b571cfbc070a1d 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -4167,6 +4167,10 @@ const KURL Document::firstPartyForCookies() const
     if (importsController() && importsController()->master() && importsController()->master() != this)
         return importsController()->master()->firstPartyForCookies();
 
+    if (!frame()) {
+        return SecurityOrigin::urlWithUniqueSecurityOrigin();
+    }

[Mike West, 2016/07/05 08:45:10]

Nit: No {} for single line bodies.

Would you mind adding a `// TODO(mkwst): This doesn't properly handle HTML
Import documents.` I have another CL floating around somewhere that addresses
this case, but it's not ready to land yet.

[tyoshino (SeeGerritForStatus), 2016/07/05 14:41:27]

Fixed
Added to the top of the function

+
     // TODO(mkwst): This doesn't correctly handle sandboxed documents; we want to look at their URL,
     // but we can't because we don't know what it is.
     Frame* top = frame()->tree().top();