Add a NavigationThrottle to the public content/ interface

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 6cc7f6196f95a3832224a5332cb20df0b113cf6c..e59faa4d3534bc5fafce8fe6ecac7229e60d94bf 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -41,6 +41,7 @@
 #include "content/browser/loader/detachable_resource_handler.h"
 #include "content/browser/loader/mime_type_resource_handler.h"
 #include "content/browser/loader/navigation_resource_handler.h"
+#include "content/browser/loader/navigation_resource_throttle.h"
 #include "content/browser/loader/navigation_url_loader_impl_core.h"
 #include "content/browser/loader/power_save_block_resource_throttle.h"
 #include "content/browser/loader/redirect_to_file_resource_handler.h"
@@ -1438,6 +1439,17 @@ scoped_ptr<ResourceHandler> ResourceDispatcherHostImpl::AddStandardHandlers(
                                             plugin_service, request));
 
   ScopedVector<ResourceThrottle> throttles;
+
+  // Add a NavigationResourceThrottle for navigations.
+  // PlzNavigate: the thottle is unnecessary as communication with the UI

[davidben, 2015/09/01 21:55:18]

Nit: throttle

[clamy, 2015/09/03 15:30:52]

Done.

+  // thread is handled by the NavigationURLloader.
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation) &&
+      (resource_type == RESOURCE_TYPE_MAIN_FRAME ||
+       resource_type == RESOURCE_TYPE_SUB_FRAME)) {

[davidben, 2015/09/01 21:55:18]

IsResourceTypeFrame?

[clamy, 2015/09/03 15:30:52]

Done.

+    throttles.push_back(new NavigationResourceThrottle(request));
+  }
+
   if (delegate_) {
     delegate_->RequestBeginning(request,
                                 resource_context,