Implement the 'noopener' link relation.

third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp b/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
index 4f07d032c5f03880eed353c6da3e3a3b1e04d47d..2e94e235294c41fe4788339ce2412d2a203e2f4a 100644
--- a/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
@@ -300,6 +300,8 @@ void HTMLAnchorElement::setRel(const AtomicString& value)
     // FIXME: Add link relations as they are implemented
     if (newLinkRelations.contains("noreferrer"))
         m_linkRelations |= RelationNoReferrer;
+    if (newLinkRelations.contains("noopener"))
+        m_linkRelations |= RelationNoOpener;
 }
 
 const AtomicString& HTMLAnchorElement::name() const
@@ -371,6 +373,8 @@ void HTMLAnchorElement::handleClick(Event* event)
             frameRequest.setShouldSendReferrer(NeverSendReferrer);
             frameRequest.setShouldSetOpener(NeverSetOpener);
         }
+        if (hasRel(RelationNoOpener))
+            frameRequest.setShouldSetOpener(NeverSetOpener);
         frame->loader().load(frameRequest);
     }
 }