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

webkit/fileapi/local_file_stream_writer_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.
 
 #include "webkit/fileapi/local_file_stream_writer.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 59 matching lines @@
   base::ScopedTempDir temp_dir_;
 };
 
 void NeverCalled(int unused) {
   ADD_FAILURE();
 }
 
 }  // namespace
 
 TEST_F(LocalFileStreamWriterTest, Write) {
-  base::FilePath path = CreateFileWithContent("file_a", "");
+  base::FilePath path = CreateFileWithContent("file_a", std::string());
   scoped_ptr<LocalFileStreamWriter> writer(new LocalFileStreamWriter(path, 0));
   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "bar"));
   writer.reset();
   MessageLoop::current()->RunUntilIdle();
   EXPECT_TRUE(file_util::PathExists(path));
   EXPECT_EQ("foobar", GetFileContent(path));
 }
 
 TEST_F(LocalFileStreamWriterTest, WriteMiddle) {
@@ skipping 28 matching lines @@
 
 TEST_F(LocalFileStreamWriterTest, CancelBeforeOperation) {
   base::FilePath path = Path("file_a");
   scoped_ptr<LocalFileStreamWriter> writer(new LocalFileStreamWriter(path, 0));
   // Cancel immediately fails when there's no in-flight operation.
   int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
   EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
 }
 
 TEST_F(LocalFileStreamWriterTest, CancelAfterFinishedOperation) {
-  base::FilePath path = CreateFileWithContent("file_a", "");
+  base::FilePath path = CreateFileWithContent("file_a", std::string());
   scoped_ptr<LocalFileStreamWriter> writer(new LocalFileStreamWriter(path, 0));
   EXPECT_EQ(net::OK, WriteStringToWriter(writer.get(), "foo"));
 
   // Cancel immediately fails when there's no in-flight operation.
   int cancel_result = writer->Cancel(base::Bind(&NeverCalled));
   EXPECT_EQ(net::ERR_UNEXPECTED, cancel_result);
 
   writer.reset();
   MessageLoop::current()->RunUntilIdle();
   // Write operation is already completed.
   EXPECT_TRUE(file_util::PathExists(path));
   EXPECT_EQ("foo", GetFileContent(path));
 }
 
 TEST_F(LocalFileStreamWriterTest, CancelWrite) {
   base::FilePath path = CreateFileWithContent("file_a", "foobar");
   scoped_ptr<LocalFileStreamWriter> writer(new LocalFileStreamWriter(path, 0));
 
   scoped_refptr<net::StringIOBuffer> buffer(new net::StringIOBuffer("xxx"));
   int result = writer->Write(buffer, buffer->size(), base::Bind(&NeverCalled));
   ASSERT_EQ(net::ERR_IO_PENDING, result);
 
   net::TestCompletionCallback callback;
   writer->Cancel(callback.callback());
   int cancel_result = callback.WaitForResult();
   EXPECT_EQ(net::OK, cancel_result);
 }