Try to restore window.opener when opening blocked popups

content/public/browser/navigation_controller.cc

Index: content/public/browser/navigation_controller.cc
diff --git a/content/public/browser/navigation_controller.cc b/content/public/browser/navigation_controller.cc
index f6502a3c524a13ad67771950f3fee7d2fe0b2f76..4047b4368cef10c06e035546058d093e5ffc3248 100644
--- a/content/public/browser/navigation_controller.cc
+++ b/content/public/browser/navigation_controller.cc
@@ -17,7 +17,8 @@ NavigationController::LoadURLParams::LoadURLParams(const GURL& url)
       browser_initiated_post_data(NULL),
       can_load_local_resources(false),
       should_replace_current_entry(false),
-      should_clear_history_list(false)  {
+      should_clear_history_list(false),
+      should_stay_in_site_instance(false) {
 }
 
 NavigationController::LoadURLParams::~LoadURLParams() {
@@ -37,7 +38,8 @@ NavigationController::LoadURLParams::LoadURLParams(
       virtual_url_for_data_url(other.virtual_url_for_data_url),
       browser_initiated_post_data(other.browser_initiated_post_data),
       should_replace_current_entry(false),
-      should_clear_history_list(false) {
+      should_clear_history_list(false),
+      should_stay_in_site_instance(false) {
 }
 
 NavigationController::LoadURLParams&
@@ -56,6 +58,7 @@ NavigationController::LoadURLParams::operator=(
   browser_initiated_post_data = other.browser_initiated_post_data;
   should_replace_current_entry = other.should_replace_current_entry;
   should_clear_history_list = other.should_clear_history_list;
+  should_stay_in_site_instance = other.should_stay_in_site_instance;
 
   return *this;
 }