Move MimeTypeResourceHandler before ThrottlingResourceHandler

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index da256df980413b76fe334efae34d9216b3394399..f8892f937a8d2d097afc7517ff6a6f351c586346 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1720,14 +1720,6 @@ ResourceDispatcherHostImpl::AddStandardHandlers(
     return handler;
   }
 
-  PluginService* plugin_service = nullptr;
-#if defined(ENABLE_PLUGINS)
-  plugin_service = PluginService::GetInstance();
-#endif
-  // Insert a buffered event handler before the actual one.
-  handler.reset(new MimeTypeResourceHandler(std::move(handler), this,
-                                            plugin_service, request));
-
   ScopedVector<ResourceThrottle> throttles;
 
   // Add a NavigationResourceThrottle for navigations.
@@ -1758,6 +1750,15 @@ ResourceDispatcherHostImpl::AddStandardHandlers(
   handler.reset(new ThrottlingResourceHandler(std::move(handler), request,
                                               std::move(throttles)));
 
+  PluginService* plugin_service = nullptr;
+#if defined(ENABLE_PLUGINS)
+  plugin_service = PluginService::GetInstance();
+#endif
+
+  // Insert a buffered event handler to sniff the mime type first.
+  handler.reset(new MimeTypeResourceHandler(std::move(handler), this,
+                                            plugin_service, request));
+
   return handler;
 }