Make "document.anchors" return anchors with "id" attribute also

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

Index: third_party/WebKit/Source/core/html/HTMLCollection.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCollection.cpp b/third_party/WebKit/Source/core/html/HTMLCollection.cpp
index 194ae8edd4119b95a938aabbbbe35ac2f52ceda0..c42cae0493a52ab83c46423723777e980dc5974d 100644
--- a/third_party/WebKit/Source/core/html/HTMLCollection.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCollection.cpp
@@ -141,13 +141,11 @@ static NodeListInvalidationType invalidationTypeExcludingIdAndNameAttributes(Col
         // FIXME: We can do better some day.
         return InvalidateOnAnyAttrChange;
     case DocAnchors:
-        return InvalidateOnNameAttrChange;
-    case DocLinks:
-        return InvalidateOnHRefAttrChange;
-    case WindowNamedItems:
-        return InvalidateOnIdNameAttrChange;
     case DocumentNamedItems:
+    case WindowNamedItems:
         return InvalidateOnIdNameAttrChange;
+    case DocLinks:
+        return InvalidateOnHRefAttrChange;
     case FormControls:
         return InvalidateForFormControls;
     case ClassCollectionType:
@@ -233,7 +231,7 @@ static inline bool isMatchingHTMLElement(const HTMLCollection& htmlCollection, c
     case DocLinks:
         return (element.hasTagName(aTag) || element.hasTagName(areaTag)) && element.fastHasAttribute(hrefAttr);
     case DocAnchors:
-        return element.hasTagName(aTag) && element.fastHasAttribute(nameAttr);
+        return element.hasTagName(aTag) && (element.fastHasAttribute(nameAttr) || element.fastHasAttribute(idAttr));
     case ClassCollectionType:
     case TagCollectionType:
     case HTMLTagCollectionType: