Show offline interstitial page when offline and reload when reconnected to network.

chrome/browser/renderer_host/resource_dispatcher_host.cc

Index: chrome/browser/renderer_host/resource_dispatcher_host.cc
diff --git a/chrome/browser/renderer_host/resource_dispatcher_host.cc b/chrome/browser/renderer_host/resource_dispatcher_host.cc
index 3f093aec974add18d7660194e8b5fda77249b49d..130997acdd929ad8d10152c769b616517c38d638 100644
--- a/chrome/browser/renderer_host/resource_dispatcher_host.cc
+++ b/chrome/browser/renderer_host/resource_dispatcher_host.cc
@@ -64,6 +64,11 @@
 #include "webkit/appcache/appcache_interceptor.h"
 #include "webkit/appcache/appcache_interfaces.h"
 
+// TODO(oshima): Enable this for other platforms.
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/renderer_host/offline_resource_handler.h"
+#endif
+
 // Uncomment to enable logging of request traffic.
 // #define LOG_RESOURCE_DISPATCHER_REQUESTS
 
@@ -447,6 +452,13 @@ void ResourceDispatcherHost::BeginRequest(
                                                 request_data.resource_type);
   }
 
+#if defined(OS_CHROMEOS)
+  // We check offline first, then check safe browsing so that we still can block
+  // unsafe site after we remove offline page.
+  handler =
+      new OfflineResourceHandler(handler, child_id, route_id, this, request);
+#endif
+
   // Make extra info and read footer (contains request ID).
   ResourceDispatcherHostRequestInfo* extra_info =
       new ResourceDispatcherHostRequestInfo(