Set credentials mode "same-origin" when crossOrigin=anonymous is set.

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

Index: third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
index 1dbb604cf43a662629a8c84f71bcc1d9d427534e..2d41712a45527ab77aed94835787d59810dec28f 100644
--- a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
@@ -44,6 +44,7 @@
 #include "core/frame/SubresourceIntegrity.h"
 #include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
+#include "core/html/CrossOriginAttribute.h"
 #include "core/html/LinkManifest.h"
 #include "core/html/imports/LinkImport.h"
 #include "core/inspector/ConsoleMessage.h"
@@ -202,7 +203,7 @@ bool HTMLLinkElement::shouldLoadLink()
 
 bool HTMLLinkElement::loadLink(const String& type, const String& as, const KURL& url)
 {
-    return m_linkLoader.loadLink(m_relAttribute, fastGetAttribute(HTMLNames::crossoriginAttr), type, as, url, document(), NetworkHintsInterfaceImpl());
+    return m_linkLoader.loadLink(m_relAttribute, crossOriginAttributeValue(fastGetAttribute(HTMLNames::crossoriginAttr)), type, as, url, document(), NetworkHintsInterfaceImpl());
 }
 
 LinkResource* HTMLLinkElement::linkResourceToProcess()
@@ -724,9 +725,9 @@ void LinkStyle::process()
 
         // Load stylesheets that are not needed for the layout immediately with low priority.
         FetchRequest request = builder.build(blocking);
-        AtomicString crossOriginMode = m_owner->fastGetAttribute(HTMLNames::crossoriginAttr);
-        if (!crossOriginMode.isNull()) {
-            request.setCrossOriginAccessControl(document().securityOrigin(), crossOriginMode);
+        CrossOriginAttributeValue crossOrigin = crossOriginAttributeValue(m_owner->fastGetAttribute(HTMLNames::crossoriginAttr));
+        if (crossOrigin != CrossOriginAttributeNotSet) {
+            request.setCrossOriginAccessControl(document().securityOrigin(), crossOrigin);
             setFetchFollowingCORS();
         }
         setResource(CSSStyleSheetResource::fetch(request, document().fetcher()));