Add an identity component for unique/opaque url::Origins.

third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp

Index: third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
diff --git a/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp b/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
index d7c0ccb1c6342a0800288451fa01992ed5f4c2aa..f32b4f960f33ae02a0145b2b122959cfba922934 100644
--- a/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
+++ b/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
@@ -151,6 +151,7 @@ SecurityOrigin::SecurityOrigin()
     : m_protocol(emptyString),
       m_host(emptyString),
       m_domain(emptyString),
+      m_uniqueID(base::UnguessableToken::Create()),
       m_port(InvalidPort),
       m_effectivePort(InvalidPort),
       m_isUnique(true),
@@ -165,6 +166,7 @@ SecurityOrigin::SecurityOrigin(const SecurityOrigin* other)
       m_host(other->m_host.isolatedCopy()),
       m_domain(other->m_domain.isolatedCopy()),
       m_suborigin(other->m_suborigin),
+      m_uniqueID(other->m_uniqueID),
       m_port(other->m_port),
       m_effectivePort(other->m_effectivePort),
       m_isUnique(other->m_isUnique),
@@ -228,8 +230,10 @@ bool SecurityOrigin::canAccess(const SecurityOrigin* other) const {
   if (this == other)
     return true;
 
-  if (isUnique() || other->isUnique())
-    return false;
+  if (isUnique() || other->isUnique()) {
+    return isUnique() && other->isUnique() ? m_uniqueID == other->m_uniqueID
+                                           : false;
+  }
 
   // document.domain handling, as per
   // https://html.spec.whatwg.org/multipage/browsers.html#dom-document-domain: