Improve error messaging of webRequest API in case of conflicts

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 78d62775227981b202f61c23de51d3d50715fb9e..98f0b1d7f82cf8464d17179d7e76c0d710bcab67 100644
--- a/chrome/browser/extensions/extension_system.cc
+++ b/chrome/browser/extensions/extension_system.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
+#include "chrome/browser/extensions/extension_warning_set.h"
 #include "chrome/browser/extensions/lazy_background_task_queue.h"
 #include "chrome/browser/extensions/management_policy.h"
 #include "chrome/browser/extensions/api/messaging/message_service.h"
@@ -293,6 +294,8 @@ void ExtensionSystemImpl::InitForRegularProfile(bool extensions_enabled) {
   rules_registry_service_.reset(new RulesRegistryService(profile_));
   rules_registry_service_->RegisterDefaultRulesRegistries();
 
+  extension_warning_service_.reset(new ExtensionWarningService(profile_));
+
   shared_->Init(extensions_enabled);
 }
 
@@ -375,6 +378,10 @@ ExtensionSystemImpl::usb_device_resource_manager() {
   return usb_device_resource_manager_.get();
 }
 
+ExtensionWarningService* ExtensionSystemImpl::warning_service() {
+  return extension_warning_service_.get();
+}
+
 void ExtensionSystemImpl::RegisterExtensionWithRequestContexts(
     const Extension* extension) {
   base::Time install_time;