Revert of Service Manager: Remove ServiceContext* arg from Service::OnStart()

components/font_service/font_service_app.cc

Index: components/font_service/font_service_app.cc
diff --git a/components/font_service/font_service_app.cc b/components/font_service/font_service_app.cc
index f78b4c23b93129ba0802f73cae973895dc0e3619..bd9f49074ff3ad2b32d302f05cd4849be71be2ef 100644
--- a/components/font_service/font_service_app.cc
+++ b/components/font_service/font_service_app.cc
@@ -50,8 +50,8 @@
 
 FontServiceApp::~FontServiceApp() {}
 
-void FontServiceApp::OnStart() {
-  tracing_.Initialize(context()->connector(), context()->identity().name());
+void FontServiceApp::OnStart(service_manager::ServiceContext* context) {
+  tracing_.Initialize(context->connector(), context->identity().name());
 }
 
 bool FontServiceApp::OnConnect(const service_manager::ServiceInfo& remote_info,