[Prerender] Ignores resources with unsupported schemes for Offline reqs

chrome/browser/prerender/prerender_resource_throttle.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_resource_throttle.h"
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/numerics/safe_conversions.h"
 #include "build/build_config.h"
@@ skipping 161 matching lines @@
       // If this is a full prerender, cancel the prerender in response to
       // invalid requests.  For prefetches, cancel invalid requests but keep the
       // prefetch going, unless it's the main frame that's invalid.
       if (prerender_contents->prerender_mode() == FULL_PRERENDER ||
           resource_type == content::RESOURCE_TYPE_MAIN_FRAME) {
         prerender_contents->Destroy(FINAL_STATUS_INVALID_HTTP_METHOD);
       }
       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 ORIGIN_OFFLINE, simply cancel this invalid request and continue.
+      // 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) {
       // Delay icon fetching until the contents are getting swapped in
       // to conserve network usage in mobile devices.
       prerender_contents->AddResourceThrottle(throttle);
       return;
 #endif
     }
   }
@@ skipping 77 matching lines @@
   if (g_prerender_contents_for_testing)
     return g_prerender_contents_for_testing;
   return PrerenderContents::FromWebContents(web_contents_getter.Run());
 }
 
 void PrerenderResourceThrottle::SetPrerenderMode(PrerenderMode mode) {
   load_flags_ = (mode == PREFETCH_ONLY) ? net::LOAD_PREFETCH : net::LOAD_NORMAL;
 }
 
 }  // namespace prerender