Bug 1166910 - referrer attribute for img tag. r=hsivonen

dom/html/nsGenericHTMLElement.cpp

@@ -106,6 +106,8 @@
 #include "mozilla/dom/HTMLBodyElement.h"
 #include "imgIContainer.h"
 
+#include "mozilla/net/ReferrerPolicy.h"
+
 using namespace mozilla;
 using namespace mozilla::dom;
 
@@ -995,6 +997,10 @@ nsGenericHTMLElement::ParseAttribute(int32_t aNamespaceID,
       return aResult.ParseIntValue(aValue);
     }
 
+    if (aAttribute == nsGkAtoms::referrer) {
+      return ParseReferrerAttribute(aValue, aResult);
+    }
+
     if (aAttribute == nsGkAtoms::name) {
       // Store name as an atom.  name="" means that the element has no name,
       // not that it has an emptystring as the name.
@@ -1262,6 +1268,19 @@ nsGenericHTMLElement::ParseImageAttribute(nsIAtom* aAttribute,
   return false;
 }
 
+bool
+nsGenericHTMLElement::ParseReferrerAttribute(const nsAString& aString,
+                                             nsAttrValue& aResult)
+{
+  static const nsAttrValue::EnumTable kReferrerTable[] = {
+    { "no-referrer", net::RP_No_Referrer },
+    { "origin", net::RP_Origin },
+    { "unsafe-url", net::RP_Unsafe_URL },
+    { 0 }
+  };
+  return aResult.ParseEnumValue(aString, kReferrerTable, false);
+}
+
 bool
 nsGenericHTMLElement::ParseFrameborderValue(const nsAString& aString,
                                             nsAttrValue& aResult)