PlzNavigate: Move navigation-level mixed content checks to the browser.

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 6cd99e8f9fcebe11be63a288316d1deeefa0859b..d8f675250d20cf6a9955c3b9c084a911d15be564 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1684,6 +1684,7 @@ ResourceDispatcherHostImpl::CreateResourceHandler(
   return AddStandardHandlers(request, request_data.resource_type,
                              resource_context,
                              request_data.fetch_request_context_type,
+                             request_data.fetch_mixed_content_context_type,
                              requester_info->appcache_service(), child_id,
                              route_id, std::move(handler));
 }
@@ -1694,6 +1695,7 @@ ResourceDispatcherHostImpl::AddStandardHandlers(
     ResourceType resource_type,
     ResourceContext* resource_context,
     RequestContextType fetch_request_context_type,
+    blink::WebMixedContent::ContextType fetch_mixed_content_context_type,
     AppCacheService* appcache_service,
     int child_id,
     int route_id,
@@ -1712,7 +1714,8 @@ ResourceDispatcherHostImpl::AddStandardHandlers(
   // thread is handled by the NavigationURLloader.
   if (!IsBrowserSideNavigationEnabled() && IsResourceTypeFrame(resource_type)) {
     throttles.push_back(base::MakeUnique<NavigationResourceThrottle>(
-        request, delegate_, fetch_request_context_type));
+        request, delegate_, fetch_request_context_type,
+        fetch_mixed_content_context_type));
   }
 
   if (delegate_) {
@@ -2286,6 +2289,7 @@ void ResourceDispatcherHostImpl::BeginNavigationRequest(
   handler = AddStandardHandlers(
       new_request.get(), resource_type, resource_context,
       info.begin_params.request_context_type,
+      info.begin_params.mixed_content_context_type,
       appcache_handle_core ? appcache_handle_core->GetAppCacheService()
                            : nullptr,
       -1,  // child_id