Standardize usage of virtual/override/final specifiers in printing code.

cloud_print/service/service_state.cc

Index: cloud_print/service/service_state.cc
diff --git a/cloud_print/service/service_state.cc b/cloud_print/service/service_state.cc
index 59554bbdab61aa675eefa2d90251ac6a110cd49d..1164e960df9d0ba3b0c1f57dd22fec3d4dcdabbf 100644
--- a/cloud_print/service/service_state.cc
+++ b/cloud_print/service/service_state.cc
@@ -38,7 +38,7 @@ const int64 kRequestTimeoutMs = 10 * 1000;
 
 class ServiceStateURLRequestDelegate : public net::URLRequest::Delegate {
  public:
-  virtual void OnResponseStarted(net::URLRequest* request) override {
+  void OnResponseStarted(net::URLRequest* request) override {
     if (request->GetResponseCode() == 200) {
       Read(request);
       if (request->status().is_io_pending())
@@ -47,8 +47,7 @@ class ServiceStateURLRequestDelegate : public net::URLRequest::Delegate {
     request->Cancel();
   }
 
-  virtual void OnReadCompleted(net::URLRequest* request,
-                               int bytes_read) override {
+  void OnReadCompleted(net::URLRequest* request, int bytes_read) override {
     Read(request);
     if (!request->status().is_io_pending())
       base::MessageLoop::current()->Quit();