Update ReplaceIllegalCharactersInPath to handle quirks in HFS+ and VFS

content/browser/download/save_package_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 <string>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 364 matching lines @@
   },
   // Make sure fuzzy matching works.
   { "http://foo.com/bar",
     base::ASCIIToUTF16("foo.com/bar"),
     FPL("bar"),
     false
   },
   // A URL-like title that does not match the title is respected in full.
   { "http://foo.com",
     base::ASCIIToUTF16("http://www.foo.com/path/title.txt"),
-    FPL("http   www.foo.com path title.txt"),
+    FPL("http___www.foo.com_path_title.txt"),
     false
   },
 };
 
 // Crashing on Windows, see http://crbug.com/79365
 #if defined(OS_WIN)
 #define MAYBE_TestSuggestedSaveNames DISABLED_TestSuggestedSaveNames
 #else
 #define MAYBE_TestSuggestedSaveNames TestSuggestedSaveNames
 #endif
@@ skipping 35 matching lines @@
   GURL view_source_url =
       GURL(kViewSourceScheme + std::string(":") + mock_url.spec());
   GURL actual_url = net::URLRequestMockHTTPJob::GetMockUrl(
       base::FilePath(kTestDir).Append(file_name));
   NavigateAndCommit(view_source_url);
   EXPECT_EQ(actual_url, GetUrlToBeSaved());
   EXPECT_EQ(view_source_url, contents()->GetLastCommittedURL());
 }
 
 }  // namespace content