Add a flag to nsIWebNavigation to disable popup-blocking for loads as needed.

Bug 278357, r=biesi, sr=jst, a=bsmedberg

docshell/base/nsDocShell.cpp

@@ -2801,6 +2801,16 @@ nsDocShell::LoadURI(const PRUnichar * aURI,
     if (NS_FAILED(rv) || !uri)
         return NS_ERROR_FAILURE;
 
+    PopupControlState popupState;
+    if (aLoadFlags & LOAD_FLAGS_ALLOW_POPUPS) {
+        popupState = openAllowed;
+        aLoadFlags &= ~LOAD_FLAGS_ALLOW_POPUPS;
+    } else {
+        popupState = openOverridden;
+    }
+    nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(mScriptGlobal));
+    nsAutoPopupStatePusher statePusher(win, popupState);
+
     // Don't pass certain flags that aren't needed and end up confusing
     // ConvertLoadTypeToDocShellLoadInfo.  We do need to ensure that they are
     // passed to LoadURI though, since it uses them.

docshell/base/nsIWebNavigation.idl

@@ -191,6 +191,12 @@ interface nsIWebNavigation : nsISupports
    */
   const unsigned long LOAD_FLAGS_FIRST_LOAD = 0x4000;
 
+  /**
+   * This flag specifies that the load should not be subject to popup
+   * blocking checks.
+   */
+  const unsigned long LOAD_FLAGS_ALLOW_POPUPS = 0x8000;
+
   /**
    * Loads a given URI.  This will give priority to loading the requested URI
    * in the object implementing	this interface.  If it can't be loaded here