Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/signin/token_service_unittest.cc

Index: chrome/browser/signin/token_service_unittest.cc
diff --git a/chrome/browser/signin/token_service_unittest.cc b/chrome/browser/signin/token_service_unittest.cc
index 93e9c7b3ceac79c826db2ca8f3ade24d85bc1b91..a77b6b30b9bd25cd63b035c52a033bb8c9745c3d 100644
--- a/chrome/browser/signin/token_service_unittest.cc
+++ b/chrome/browser/signin/token_service_unittest.cc
@@ -232,7 +232,8 @@ TEST_F(TokenServiceTest, OnTokenSuccessUpdate) {
 }
 
 TEST_F(TokenServiceTest, OnOAuth2LoginTokenSuccessUpdate) {
-  std::string service = GaiaConstants::kGaiaOAuth2LoginRefreshToken;
+  EXPECT_FALSE(service_->HasOAuthLoginToken());
+
   service_->OnClientOAuthSuccess(
       GaiaAuthConsumer::ClientOAuthResult("rt1", "at1", 3600));
   EXPECT_TRUE(service_->HasOAuthLoginToken());