Resolve issue from feedback for 1417363004

chrome/browser/extensions/api/gcd_private/gcd_private_api.cc

Index: chrome/browser/extensions/api/gcd_private/gcd_private_api.cc
diff --git a/chrome/browser/extensions/api/gcd_private/gcd_private_api.cc b/chrome/browser/extensions/api/gcd_private/gcd_private_api.cc
index 22a79fbd18700f75e7777e53591cf8e97de92118..d282f40d35372d340ecda6c9a3a449a764a7f234 100644
--- a/chrome/browser/extensions/api/gcd_private/gcd_private_api.cc
+++ b/chrome/browser/extensions/api/gcd_private/gcd_private_api.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/extensions/api/gcd_private/gcd_private_api.h"
 
+#include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/memory/linked_ptr.h"
@@ -23,6 +24,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
+#include "chrome/common/chrome_switches.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_manager_base.h"
@@ -317,6 +319,11 @@ bool GcdPrivateAPIImpl::QueryForDevices() {
 void GcdPrivateAPIImpl::CreateSession(const std::string& service_name,
                                       const CreateSessionCallback& callback) {
   int session_id = last_session_id_++;
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnablePrivetV3)) {
+    return callback.Run(session_id, gcd_private::STATUS_SESSIONERROR,
+                        base::DictionaryValue());
+  }
   scoped_ptr<local_discovery::PrivetHTTPAsynchronousFactory> factory(
       local_discovery::PrivetHTTPAsynchronousFactory::CreateInstance(
           browser_context_->GetRequestContext()));