[Prerender] Ignores resources with unsupported schemes for Offline reqs

chrome/browser/prerender/prerender_resource_throttle.cc

Index: chrome/browser/prerender/prerender_resource_throttle.cc
diff --git a/chrome/browser/prerender/prerender_resource_throttle.cc b/chrome/browser/prerender/prerender_resource_throttle.cc
index 8d8511e22e2fc16a1612f39e862089171ecc2afa..95bbbbd4a20970d40a925b2ae259055801823770 100644
--- a/chrome/browser/prerender/prerender_resource_throttle.cc
+++ b/chrome/browser/prerender/prerender_resource_throttle.cc
@@ -184,13 +184,18 @@ void PrerenderResourceThrottle::WillStartRequestOnUI(
       cancel = true;
     } else if (!PrerenderManager::DoesSubresourceURLHaveValidScheme(url) &&
                resource_type != content::RESOURCE_TYPE_MAIN_FRAME) {
-      // Destroying the prerender for unsupported scheme only for non-main
-      // resource to allow chrome://crash to actually crash in the
-      // *RendererCrash tests instead of being intercepted here. The unsupported
-      // scheme for the main resource is checked in WillRedirectRequestOnUI()
-      // and PrerenderContents::CheckURL(). See http://crbug.com/673771.
-      prerender_contents->Destroy(FINAL_STATUS_UNSUPPORTED_SCHEME);
-      ReportUnsupportedPrerenderScheme(url);
+      // For OFFLINE_ORIGIN, simply cancel this invalid request and continue.

[pasko, 2017/02/01 01:08:09]

nit: s/OFFLINE_ORIGIN/ORIGIN_OFFLINE/

[dougarnett, 2017/02/06 17:05:01]

Done.

+      // For other origins, fail the prerender here.
+      if (prerender_contents->origin() != ORIGIN_OFFLINE) {
+        // Destroying the prerender for unsupported scheme only for non-main
+        // resource to allow chrome://crash to actually crash in the
+        // *RendererCrash tests instead of being intercepted here. The
+        // unsupported
+        // scheme for the main resource is checked in WillRedirectRequestOnUI()
+        // and PrerenderContents::CheckURL(). See http://crbug.com/673771.
+        prerender_contents->Destroy(FINAL_STATUS_UNSUPPORTED_SCHEME);
+        ReportUnsupportedPrerenderScheme(url);
+      }
       cancel = true;
 #if defined(OS_ANDROID)
     } else if (resource_type == content::RESOURCE_TYPE_FAVICON) {