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

chrome/browser/google_apis/gdata_wapi_operations_unittest.cc

Index: chrome/browser/google_apis/gdata_wapi_operations_unittest.cc
diff --git a/chrome/browser/google_apis/gdata_wapi_operations_unittest.cc b/chrome/browser/google_apis/gdata_wapi_operations_unittest.cc
index 1a15c622b1aa4c448095eca57b92e80e9fe9d1cd..7f2395dad8f1999abe37b8ea3bbfccf865b3be70 100644
--- a/chrome/browser/google_apis/gdata_wapi_operations_unittest.cc
+++ b/chrome/browser/google_apis/gdata_wapi_operations_unittest.cc
@@ -325,10 +325,10 @@ TEST_F(GDataWapiOperationsTest, GetResourceListOperation_DefaultFeed) {
       &operation_registry_,
       request_context_getter_.get(),
       *url_generator_,
-      GURL(),  // Pass an empty URL to use the default feed
-      0,  // start changestamp
-      "",  // search string
-      "",  // directory resource ID
+      GURL(),         // Pass an empty URL to use the default feed
+      0,              // start changestamp
+      std::string(),  // search string
+      std::string(),  // directory resource ID
       CreateComposedCallback(
           base::Bind(&test_util::RunAndQuit),
           test_util::CreateCopyResultCallback(&result_code, &result_data)));
@@ -360,9 +360,9 @@ TEST_F(GDataWapiOperationsTest, GetResourceListOperation_ValidFeed) {
       request_context_getter_.get(),
       *url_generator_,
       test_server_.GetURL("/files/chromeos/gdata/root_feed.json"),
-      0,  // start changestamp
-      "",  // search string
-      "",  // directory resource ID
+      0,              // start changestamp
+      std::string(),  // search string
+      std::string(),  // directory resource ID
       CreateComposedCallback(
           base::Bind(&test_util::RunAndQuit),
           test_util::CreateCopyResultCallback(&result_code, &result_data)));
@@ -395,9 +395,9 @@ TEST_F(GDataWapiOperationsTest, GetResourceListOperation_InvalidFeed) {
       request_context_getter_.get(),
       *url_generator_,
       test_server_.GetURL("/files/chromeos/gdata/testfile.txt"),
-      0,  // start changestamp
-      "",  // search string
-      "",  // directory resource ID
+      0,              // start changestamp
+      std::string(),  // search string
+      std::string(),  // directory resource ID
       CreateComposedCallback(
           base::Bind(&test_util::RunAndQuit),
           test_util::CreateCopyResultCallback(&result_code, &result_data)));
@@ -548,11 +548,10 @@ TEST_F(GDataWapiOperationsTest, DeleteResourceOperation) {
       &operation_registry_,
       request_context_getter_.get(),
       *url_generator_,
-      CreateComposedCallback(
-          base::Bind(&test_util::RunAndQuit),
-          test_util::CreateCopyResultCallback(&result_code)),
+      CreateComposedCallback(base::Bind(&test_util::RunAndQuit),
+                             test_util::CreateCopyResultCallback(&result_code)),
       "file:2_file_resource_id",
-      "");
+      std::string());
 
   operation->Start(kTestGDataAuthToken, kTestUserAgent,
                    base::Bind(&test_util::DoNothingForReAuthenticateCallback));
@@ -1135,7 +1134,7 @@ TEST_F(GDataWapiOperationsTest, UploadNewLargeFile) {
 // The test is almost identical to UploadNewFile. The only difference is the
 // expectation for the Content-Range header.
 TEST_F(GDataWapiOperationsTest, UploadNewEmptyFile) {
-  const std::string kUploadContent = "";
+  const std::string kUploadContent;
   GDataErrorCode result_code = GDATA_OTHER_ERROR;
   GURL upload_url;
 
@@ -1244,7 +1243,7 @@ TEST_F(GDataWapiOperationsTest, UploadExistingFile) {
           "text/plain",
           kUploadContent.size(),
           "file:foo",
-          "" /* etag */);
+          std::string() /* etag */);
 
   initiate_operation->Start(
       kTestGDataAuthToken, kTestUserAgent,