Use OAuth2 token for sync

sync/engine/net/server_connection_manager.cc

Index: sync/engine/net/server_connection_manager.cc
diff --git a/sync/engine/net/server_connection_manager.cc b/sync/engine/net/server_connection_manager.cc
index 2d1d6c8bf0c3c8cd317fa616ed9c68f15d6b0354..d5709a72ccdf06e12cc0e1540e7deff2ed271926 100644
--- a/sync/engine/net/server_connection_manager.cc
+++ b/sync/engine/net/server_connection_manager.cc
@@ -213,12 +213,10 @@ void ServerConnectionManager::OnConnectionDestroyed(Connection* connection) {
   active_connection_ = NULL;
 }
 
-bool ServerConnectionManager::SetAuthToken(const std::string& auth_token,
-                                           const base::Time& auth_token_time) {
+bool ServerConnectionManager::SetAuthToken(const std::string& auth_token) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (previously_invalidated_token != auth_token) {
     auth_token_.assign(auth_token);
-    auth_token_time_ = auth_token_time;
     previously_invalidated_token = std::string();
     return true;
   }
@@ -226,18 +224,6 @@ bool ServerConnectionManager::SetAuthToken(const std::string& auth_token,
 }
 
 void ServerConnectionManager::OnInvalidationCredentialsRejected() {
-  if (!auth_token_time_.is_null()) {
-    base::TimeDelta age = base::Time::Now() - auth_token_time_;
-    if (age < base::TimeDelta::FromHours(1)) {
-      UMA_HISTOGRAM_CUSTOM_TIMES("Sync.AuthInvalidationRejectedTokenAgeShort",
-                                 age,
-                                 base::TimeDelta::FromSeconds(1),
-                                 base::TimeDelta::FromHours(1),
-                                 50);
-    }
-    UMA_HISTOGRAM_COUNTS("Sync.AuthInvalidationRejectedTokenAgeLong",
-                         age.InDays());
-  }
   InvalidateAndClearAuthToken();
   SetServerStatus(HttpResponse::SYNC_AUTH_ERROR);
 }
@@ -248,7 +234,6 @@ void ServerConnectionManager::InvalidateAndClearAuthToken() {
   if (!auth_token_.empty()) {
     previously_invalidated_token.assign(auth_token_);
     auth_token_ = std::string();
-    auth_token_time_ = base::Time();
   }
 }
 
@@ -300,18 +285,6 @@ bool ServerConnectionManager::PostBufferToPath(PostBufferParams* params,
       path.c_str(), auth_token, params->buffer_in, &params->response);
 
   if (params->response.server_status == HttpResponse::SYNC_AUTH_ERROR) {
-    if (!auth_token_time_.is_null()) {
-      base::TimeDelta age = base::Time::Now() - auth_token_time_;
-      if (age < base::TimeDelta::FromHours(1)) {
-        UMA_HISTOGRAM_CUSTOM_TIMES("Sync.AuthServerRejectedTokenAgeShort",
-                                   age,
-                                   base::TimeDelta::FromSeconds(1),
-                                   base::TimeDelta::FromHours(1),
-                                   50);
-      }
-      UMA_HISTOGRAM_COUNTS("Sync.AuthServerRejectedTokenAgeLong",
-                           age.InDays());
-    }
     InvalidateAndClearAuthToken();
   }