Try to restore window.opener when opening blocked popups

content/public/browser/web_contents.cc

Index: content/public/browser/web_contents.cc
diff --git a/content/public/browser/web_contents.cc b/content/public/browser/web_contents.cc
index f4de54a993e34570f050de21c5d5aae3f3a42263..ef1ab686b9b3ef3bba8a1e92b666b732b6ebdfb6 100644
--- a/content/public/browser/web_contents.cc
+++ b/content/public/browser/web_contents.cc
@@ -11,6 +11,7 @@ namespace content {
 WebContents::CreateParams::CreateParams(BrowserContext* context)
     : browser_context(context),
       site_instance(NULL),
+      opener(NULL),
       routing_id(MSG_ROUTING_NONE),
       main_frame_routing_id(MSG_ROUTING_NONE),
       context(NULL) {}
@@ -19,6 +20,7 @@ WebContents::CreateParams::CreateParams(
     BrowserContext* context, SiteInstance* site)
     : browser_context(context),
       site_instance(site),
+      opener(NULL),
       routing_id(MSG_ROUTING_NONE),
       main_frame_routing_id(MSG_ROUTING_NONE),
       context(NULL) {}