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

chrome/browser/google_apis/drive_uploader_unittest.cc

Index: chrome/browser/google_apis/drive_uploader_unittest.cc
diff --git a/chrome/browser/google_apis/drive_uploader_unittest.cc b/chrome/browser/google_apis/drive_uploader_unittest.cc
index 5f3bb622e6ab8b84373e90009f8f8bce85628873..f522a87ce7bd25411e42b895148f5bf77cad0fb2 100644
--- a/chrome/browser/google_apis/drive_uploader_unittest.cc
+++ b/chrome/browser/google_apis/drive_uploader_unittest.cc
@@ -298,7 +298,7 @@ TEST_F(DriveUploaderTest, UploadExisting0KB) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       local_path,
       kTestMimeType,
-      "",  // etag
+      std::string(),  // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();
@@ -330,7 +330,7 @@ TEST_F(DriveUploaderTest, UploadExisting512KB) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       local_path,
       kTestMimeType,
-      "",  // etag
+      std::string(),  // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();
@@ -363,7 +363,7 @@ TEST_F(DriveUploaderTest, UploadExisting1234KB) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       local_path,
       kTestMimeType,
-      "",  // etag
+      std::string(),  // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();
@@ -429,7 +429,7 @@ TEST_F(DriveUploaderTest, InitiateUploadFail) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       local_path,
       kTestMimeType,
-      "",  // etag
+      std::string(),  // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();
@@ -508,7 +508,7 @@ TEST_F(DriveUploaderTest, ResumeUploadFail) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       local_path,
       kTestMimeType,
-      "",  // etag
+      std::string(),  // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();
@@ -528,7 +528,7 @@ TEST_F(DriveUploaderTest, NonExistingSourceFile) {
       base::FilePath::FromUTF8Unsafe(kTestDrivePath),
       temp_dir_.path().AppendASCII("_this_path_should_not_exist_"),
       kTestMimeType,
-      "",  // etag
+      std::string(),             // etag
       test_util::CreateCopyResultCallback(
           &error, &drive_path, &file_path, &resource_entry));
   test_util::RunBlockingPoolTask();