Do cookie checks in NetworkDelegate instead of the URLRequest::Delegate.

chrome/browser/extensions/webstore_inline_installer.cc

Index: chrome/browser/extensions/webstore_inline_installer.cc
diff --git a/chrome/browser/extensions/webstore_inline_installer.cc b/chrome/browser/extensions/webstore_inline_installer.cc
index e28e59ea771ac15c8cdcb9486b730b7b50a1dc0c..d87d23d45f3765b02fd3ee0e6ae36e67525245ab 100644
--- a/chrome/browser/extensions/webstore_inline_installer.cc
+++ b/chrome/browser/extensions/webstore_inline_installer.cc
@@ -22,6 +22,7 @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
+#include "content/public/common/content_url_request_user_data.h"
 #include "content/public/common/url_fetcher.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
@@ -178,6 +179,9 @@ void WebstoreInlineInstaller::BeginInstall() {
       web_contents()->GetBrowserContext());
   webstore_data_url_fetcher_->SetRequestContext(
       profile->GetRequestContext());
+  // No user data, as the request will be cookie-less.
+  webstore_data_url_fetcher_->SetContentURLRequestUserData(
+      new content::ContentURLRequestUserData());
   // Use the requesting page as the referrer both since that is more correct
   // (it is the page that caused this request to happen) and so that we can
   // track top sites that trigger inline install requests.