For Offliner, pass in the URL from WebContents to SavePage request instead of the request URL since…

chrome/browser/android/offline_pages/prerendering_offliner.cc

Index: chrome/browser/android/offline_pages/prerendering_offliner.cc
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner.cc b/chrome/browser/android/offline_pages/prerendering_offliner.cc
index 35e2168398ffa4ea2da5a1a64509f29e9939d267..bab7d7fa6630b0794ed865cdf39d5ae6b0a2ed02 100644
--- a/chrome/browser/android/offline_pages/prerendering_offliner.cc
+++ b/chrome/browser/android/offline_pages/prerendering_offliner.cc
@@ -9,6 +9,7 @@
 #include "components/offline_pages/background/save_page_request.h"
 #include "components/offline_pages/offline_page_model.h"
 #include "content/public/browser/browser_context.h"
+#include "content/public/browser/web_contents.h"
 
 namespace offline_pages {
 
@@ -52,7 +53,13 @@ void PrerenderingOffliner::OnLoadPageDone(
     DCHECK(web_contents);
     std::unique_ptr<OfflinePageArchiver> archiver(
         new OfflinePageMHTMLArchiver(web_contents));
-    SavePage(request.url(), request.client_id(), std::move(archiver),
+    // Pass in the URL from the WebContents in case it is redirected from
+    // the requested URL. This is to work around a check in the
+    // OfflinePageModel implementation that ensures URL passed in here is
+    // same as LastCommittedURL from the snapshot.
+    // TODO(dougarnett): Raise issue of how to better deal with redirects.
+    SavePage(web_contents->GetLastCommittedURL(), request.client_id(),
+             std::move(archiver),
              base::Bind(&PrerenderingOffliner::OnSavePageDone,
                         weak_ptr_factory_.GetWeakPtr(), request,
                         completion_callback));