This defers starting background extension page RenderViews

chrome/browser/extensions/extension_system.cc

Index: chrome/browser/extensions/extension_system.cc
diff --git a/chrome/browser/extensions/extension_system.cc b/chrome/browser/extensions/extension_system.cc
index 801a4f7c7f1040595361fd652293ff6a8eb2b1be..17da2e0746983af243f6f8fd7a12c181c7cd9175 100644
--- a/chrome/browser/extensions/extension_system.cc
+++ b/chrome/browser/extensions/extension_system.cc
@@ -302,7 +302,9 @@ void ExtensionSystemImpl::Shutdown() {
   extension_process_manager_.reset();
 }
 
-void ExtensionSystemImpl::InitForRegularProfile(bool extensions_enabled) {
+void ExtensionSystemImpl::InitForRegularProfile(
+    bool extensions_enabled,
+    bool defer_background_creation) {
   DCHECK(!profile_->IsOffTheRecord());
   if (user_script_master() || extension_service())
     return;  // Already initialized.
@@ -313,6 +315,9 @@ void ExtensionSystemImpl::InitForRegularProfile(bool extensions_enabled) {
 
   extension_process_manager_.reset(ExtensionProcessManager::Create(profile_));
 
+  extension_process_manager_->DeferBackgroundHostCreation(
+      defer_background_creation);
+
   shared_->Init(extensions_enabled);
 }