Rewrite std::string("") to std::string(), Linux edition.

google_apis/gaia/oauth2_api_call_flow_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // A complete set of unit tests for OAuth2MintTokenFlow.
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 140 matching lines @@
         scopes));
     access_token_fetcher_.reset(new MockAccessTokenFetcher(
         flow_.get(), profile_.GetRequestContext()));
   }
 
   TestURLFetcher* SetupApiCall(bool succeeds, net::HttpStatusCode status) {
     std::string body(CreateBody());
     GURL url(CreateApiUrl());
     EXPECT_CALL(*flow_, CreateApiCallBody()).WillOnce(Return(body));
     EXPECT_CALL(*flow_, CreateApiCallUrl()).WillOnce(Return(url));
-    TestURLFetcher* url_fetcher = CreateURLFetcher(
-        url, succeeds, status, "");
+    TestURLFetcher* url_fetcher =
+        CreateURLFetcher(url, succeeds, status, std::string());
     EXPECT_CALL(factory_, CreateURLFetcher(_, url, _, _))
         .WillOnce(Return(url_fetcher));
     return url_fetcher;
   }
 
   MockUrlFetcherFactory factory_;
   scoped_ptr<MockApiCallFlow> flow_;
   scoped_ptr<MockAccessTokenFetcher> access_token_fetcher_;
   TestingProfile profile_;
 };
@@ skipping 60 matching lines @@
       GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS);
   EXPECT_CALL(*flow_, ProcessMintAccessTokenFailure(error));
   flow_->OnGetTokenFailure(error);
 }
 
 TEST_F(OAuth2ApiCallFlowTest, EmptyAccessTokenFirstApiCallSucceeds) {
   std::string rt = "refresh_token";
   std::string at = "access_token";
   std::vector<std::string> scopes(CreateTestScopes());
 
-  CreateFlow(rt, "", scopes);
+  CreateFlow(rt, std::string(), scopes);
   SetupAccessTokenFetcher(rt, scopes);
   TestURLFetcher* url_fetcher = SetupApiCall(true, net::HTTP_OK);
   EXPECT_CALL(*flow_, ProcessApiCallSuccess(url_fetcher));
   flow_->Start();
   flow_->OnGetTokenSuccess(
       at,
       base::Time::Now() + base::TimeDelta::FromMinutes(3600));
   flow_->OnURLFetchComplete(url_fetcher);
 }
 
 TEST_F(OAuth2ApiCallFlowTest, EmptyAccessTokenApiCallFails) {
   std::string rt = "refresh_token";
   std::string at = "access_token";
   std::vector<std::string> scopes(CreateTestScopes());
 
-  CreateFlow(rt, "", scopes);
+  CreateFlow(rt, std::string(), scopes);
   SetupAccessTokenFetcher(rt, scopes);
   TestURLFetcher* url_fetcher = SetupApiCall(false, net::HTTP_BAD_GATEWAY);
   EXPECT_CALL(*flow_, ProcessApiCallFailure(url_fetcher));
   flow_->Start();
   flow_->OnGetTokenSuccess(
       at,
       base::Time::Now() + base::TimeDelta::FromMinutes(3600));
   flow_->OnURLFetchComplete(url_fetcher);
 }
 
 TEST_F(OAuth2ApiCallFlowTest, EmptyAccessTokenNewTokenGenerationFails) {
   std::string rt = "refresh_token";
   std::string at = "access_token";
   std::vector<std::string> scopes(CreateTestScopes());
 
-  CreateFlow(rt, "", scopes);
+  CreateFlow(rt, std::string(), scopes);
   SetupAccessTokenFetcher(rt, scopes);
   GoogleServiceAuthError error(
       GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS);
   EXPECT_CALL(*flow_, ProcessMintAccessTokenFailure(error));
   flow_->Start();
   flow_->OnGetTokenFailure(error);
 }
 
 TEST_F(OAuth2ApiCallFlowTest, CreateURLFetcher) {
   std::string rt = "refresh_token";
   std::string at = "access_token";
   std::vector<std::string> scopes(CreateTestScopes());
   std::string body = CreateBody();
   GURL url(CreateApiUrl());
 
   CreateFlow(rt, at, scopes);
   scoped_ptr<TestURLFetcher> url_fetcher(SetupApiCall(true, net::HTTP_OK));
   flow_->CreateURLFetcher();
   HttpRequestHeaders headers;
   url_fetcher->GetExtraRequestHeaders(&headers);
   std::string auth_header;
   EXPECT_TRUE(headers.GetHeader("Authorization", &auth_header));
   EXPECT_EQ("Bearer access_token", auth_header);
   EXPECT_EQ(url, url_fetcher->GetOriginalURL());
   EXPECT_EQ(body, url_fetcher->upload_data());
 }