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

webkit/fileapi/obfuscated_file_util_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 <set>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 923 matching lines @@
   bool exclusive = false;
   bool recursive = false;
   FileSystemURL url = CreateURLFromUTF8("foo/bar");
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, ofu()->CreateDirectory(
       context.get(), url, exclusive, recursive));
 
   context.reset(NewContext(NULL));
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND,
       ofu()->DeleteDirectory(context.get(), url));
 
-  FileSystemURL root = CreateURLFromUTF8("");
+  FileSystemURL root = CreateURLFromUTF8(std::string());
   EXPECT_FALSE(DirectoryExists(url));
   EXPECT_FALSE(PathExists(url));
   context.reset(NewContext(NULL));
   EXPECT_TRUE(ofu()->IsDirectoryEmpty(context.get(), root));
 
   context.reset(NewContext(NULL));
   exclusive = false;
   recursive = true;
   EXPECT_EQ(base::PLATFORM_FILE_OK, ofu()->CreateDirectory(
       context.get(), url, exclusive, recursive));
@@ skipping 119 matching lines @@
   scoped_ptr<FileSystemOperationContext> context(NewContext(NULL));
   bool exclusive = true;
   bool recursive = true;
   FileSystemURL url = CreateURLFromUTF8("directory/to/use");
   EXPECT_EQ(base::PLATFORM_FILE_OK, ofu()->CreateDirectory(
       context.get(), url, exclusive, recursive));
   TestReadDirectoryHelper(url);
 }
 
 TEST_F(ObfuscatedFileUtilTest, TestReadRootWithSlash) {
-  TestReadDirectoryHelper(CreateURLFromUTF8(""));
+  TestReadDirectoryHelper(CreateURLFromUTF8(std::string()));
 }
 
 TEST_F(ObfuscatedFileUtilTest, TestReadRootWithEmptyString) {
   TestReadDirectoryHelper(CreateURLFromUTF8("/"));
 }
 
 TEST_F(ObfuscatedFileUtilTest, TestReadDirectoryOnFile) {
   FileSystemURL url = CreateURLFromUTF8("file");
   scoped_ptr<FileSystemOperationContext> context(NewContext(NULL));
 
@@ skipping 1150 matching lines @@
   ASSERT_EQ(base::PLATFORM_FILE_OK,
             ofu()->CreateOrOpen(
                 AllowUsageIncrease(-length)->context(), file,
                 base::PLATFORM_FILE_OPEN_TRUNCATED | base::PLATFORM_FILE_WRITE,
                 &file_handle, &created));
   ASSERT_EQ(0, ComputeTotalFileSize());
   EXPECT_TRUE(base::ClosePlatformFile(file_handle));
 }
 
 }  // namespace fileapi