Expose outgoingReferrer() to WebDocument.

This CL exposes the outgoingReferrer() method on the public WebDocument
interface. This allows Chromium to access a page's outgoing referrer
(stripped of undesirable information) via WebDocument.

BUG=522734

Review URL: https://codereview.chromium.org/1289343006

git-svn-id: svn://svn.chromium.org/blink/trunk@200946 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/WebDocument.cpp

@@ -262,6 +262,11 @@ WebReferrerPolicy WebDocument::referrerPolicy() const
     return static_cast<WebReferrerPolicy>(constUnwrap<Document>()->referrerPolicy());
 }
 
+WebString WebDocument::outgoingReferrer()
+{
+    return WebString(unwrap<Document>()->outgoingReferrer());
+}
+
 WebElement WebDocument::createElement(const WebString& tagName)
 {
     TrackExceptionState exceptionState;

third_party/WebKit/public/web/WebDocument.h

@@ -112,6 +112,7 @@ public:
     BLINK_EXPORT WebElement fullScreenElement() const;
     BLINK_EXPORT WebDOMEvent createEvent(const WebString& eventType);
     BLINK_EXPORT WebReferrerPolicy referrerPolicy() const;
+    BLINK_EXPORT WebString outgoingReferrer();
     BLINK_EXPORT WebElement createElement(const WebString& tagName);
 
     // Accessibility support. These methods should only be called on the