Issue #2736 - Part 7: Re-work <frame> and <iframe> src attribute.

Use subject principal as triggering principal in <iframe>/<frame> "src" attribute.

dom/html/nsGenericHTMLFrameElement.h

@@ -18,6 +18,10 @@
 
 class nsXULElement;
 
+#define NS_GENERICHTMLFRAMEELEMENT_IID \
+{ 0x8190db72, 0xdab0, 0x4d72, \
+  { 0x94, 0x26, 0x87, 0x5f, 0x5a, 0x8a, 0x2a, 0xe5 } }
+
 /**
  * A helper class for frame elements
  */
@@ -45,6 +49,8 @@ public:
   NS_DECL_NSIDOMMOZBROWSERFRAME
   NS_DECL_NSIMOZBROWSERFRAME
 
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_GENERICHTMLFRAMEELEMENT_IID)
+
   // nsIContent
   virtual bool IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t *aTabIndex) override;
   virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
@@ -86,6 +92,11 @@ public:
    */
   static int32_t MapScrollingAttribute(const nsAttrValue* aValue);
 
+  nsIPrincipal* GetSrcTriggeringPrincipal() const
+  {
+    return mSrcTriggeringPrincipal;
+  }
+
 protected:
   virtual ~nsGenericHTMLFrameElement();
 
@@ -109,6 +120,8 @@ protected:
   RefPtr<nsFrameLoader> mFrameLoader;
   nsCOMPtr<nsPIDOMWindowOuter> mOpenerWindow;
 
+  nsCOMPtr<nsIPrincipal> mSrcTriggeringPrincipal;
+
   /**
    * True when the element is created by the parser using the
    * NS_FROM_PARSER_NETWORK flag.
@@ -139,7 +152,12 @@ private:
    * @param aNotify Whether we plan to notify document observers.
    */
   void AfterMaybeChangeAttr(int32_t aNamespaceID, nsIAtom* aName,
-                            const nsAttrValueOrString* aValue, bool aNotify);
+                            const nsAttrValueOrString* aValue,
+                            nsIPrincipal* aMaybeScriptedPrincipal,
+                            bool aNotify);
 };
 
+NS_DEFINE_STATIC_IID_ACCESSOR(nsGenericHTMLFrameElement,
+                              NS_GENERICHTMLFRAMEELEMENT_IID)
+
 #endif // nsGenericHTMLFrameElement_h