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

content/browser/download/save_package_unittest.cc

Index: content/browser/download/save_package_unittest.cc
diff --git a/content/browser/download/save_package_unittest.cc b/content/browser/download/save_package_unittest.cc
index b5a07ae3dcada79356e8b0da1bb6056831a3ec67..e40af08fb028bbfe961b6f446160f47ccea63ec9 100644
--- a/content/browser/download/save_package_unittest.cc
+++ b/content/browser/download/save_package_unittest.cc
@@ -221,20 +221,21 @@ TEST_F(SavePackageTest, MAYBE_TestLongSavePackageFilename) {
 
   base::FilePath::StringType filename;
   // Test that the filename is successfully shortened to fit.
-  ASSERT_TRUE(GetGeneratedFilename(true, "", url, false, &filename));
+  ASSERT_TRUE(GetGeneratedFilename(true, std::string(), url, false, &filename));
   EXPECT_TRUE(filename.length() < long_file.length());
   EXPECT_FALSE(HasOrdinalNumber(filename));
 
   // Test that the filename is successfully shortened to fit, and gets an
   // an ordinal appended.
-  ASSERT_TRUE(GetGeneratedFilename(true, "", url, false, &filename));
+  ASSERT_TRUE(GetGeneratedFilename(true, std::string(), url, false, &filename));
   EXPECT_TRUE(filename.length() < long_file.length());
   EXPECT_TRUE(HasOrdinalNumber(filename));
 
   // Test that the filename is successfully shortened to fit, and gets a
   // different ordinal appended.
   base::FilePath::StringType filename2;
-  ASSERT_TRUE(GetGeneratedFilename(true, "", url, false, &filename2));
+  ASSERT_TRUE(
+      GetGeneratedFilename(true, std::string(), url, false, &filename2));
   EXPECT_TRUE(filename2.length() < long_file.length());
   EXPECT_TRUE(HasOrdinalNumber(filename2));
   EXPECT_NE(filename, filename2);