[fsp] Unmount file systems when the providing extension gets unloaded.

chrome/browser/chromeos/file_system_provider/service_factory.cc

Index: chrome/browser/chromeos/file_system_provider/service_factory.cc
diff --git a/chrome/browser/chromeos/file_system_provider/service_factory.cc b/chrome/browser/chromeos/file_system_provider/service_factory.cc
index 6fc9e9965cc944500e18890baa1310c6dfae36ea..4c618c13ea99486d33a8a0ad3d7f07b1f568c005 100644
--- a/chrome/browser/chromeos/file_system_provider/service_factory.cc
+++ b/chrome/browser/chromeos/file_system_provider/service_factory.cc
@@ -6,6 +6,8 @@
 
 #include "chrome/browser/chromeos/file_system_provider/service.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/browser/extension_registry_factory.h"
 
 namespace chromeos {
 namespace file_system_provider {
@@ -23,13 +25,17 @@ ServiceFactory* ServiceFactory::GetInstance() {
 ServiceFactory::ServiceFactory()
     : BrowserContextKeyedServiceFactory(
           "Service",
-          BrowserContextDependencyManager::GetInstance()) {}
+          BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(extensions::ExtensionRegistryFactory::GetInstance());
+}
 
 ServiceFactory::~ServiceFactory() {}
 
 KeyedService* ServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
-  return new Service(static_cast<Profile*>(profile));
+  return new Service(
+      Profile::FromBrowserContext(profile),
+      extensions::ExtensionRegistry::Get(Profile::FromBrowserContext(profile)));
 }
 
 bool ServiceFactory::ServiceIsCreatedWithBrowserContext() const { return true; }