Add a NaCl-Private interface for opening files in DIR_PNACL_COMPONENT.

chrome/browser/nacl_host/pnacl_file_host_unittest.cc

Index: chrome/browser/nacl_host/pnacl_file_host_unittest.cc
diff --git a/chrome/browser/nacl_host/pnacl_file_host_unittest.cc b/chrome/browser/nacl_host/pnacl_file_host_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..944a2ed405617d90ebea04fe4683fc971d1a65f3
--- /dev/null
+++ b/chrome/browser/nacl_host/pnacl_file_host_unittest.cc
@@ -0,0 +1,49 @@
+// 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 "chrome/browser/nacl_host/pnacl_file_host.h"
+
+#include "base/basictypes.h"
+#include "base/file_path.h"
+#include "base/path_service.h"
+#include "chrome/common/chrome_paths.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+using pnacl_file_host::PnaclCanOpenFile;
+
+// Try to pass a few funny filenames with a dummy pnacl directory set.
+TEST(PnaclFileHostTest, TestFilenamesWithPnaclPath) {
+  FilePath kDummyPnaclPath(FILE_PATH_LITERAL("dummy_pnacl_path"));
+  ASSERT_TRUE(PathService::Override(chrome::DIR_PNACL_COMPONENT,
+                                    kDummyPnaclPath));
+  ASSERT_TRUE(PathService::Get(chrome::DIR_PNACL_COMPONENT,
+                               &kDummyPnaclPath));
+  FilePath out_path;
+  EXPECT_TRUE(PnaclCanOpenFile("manifest.json", &out_path));
+  FilePath expected_path = kDummyPnaclPath.Append(
+      FILE_PATH_LITERAL("manifest.json"));
+  EXPECT_EQ(out_path, expected_path);
+
+  EXPECT_TRUE(PnaclCanOpenFile("x86-32/llc", &out_path));
+  expected_path = kDummyPnaclPath.Append(FILE_PATH_LITERAL("x86-32/llc"));
+  EXPECT_EQ(out_path, expected_path);
+
+  EXPECT_FALSE(PnaclCanOpenFile("", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile(".", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("..", &out_path));
+#if defined(OS_WIN)
+  EXPECT_FALSE(PnaclCanOpenFile("..\\llc", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("%SystemRoot%", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("%SystemRoot%\\explorer.exe", &out_path));
+#else
+  EXPECT_FALSE(PnaclCanOpenFile("../llc", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("/bin/sh", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("$HOME", &out_path));
+  EXPECT_FALSE(PnaclCanOpenFile("$HOME/.bashrc", &out_path));
+#endif
+
+  const char non_ascii[] = "\xff\xfe";
+  EXPECT_FALSE(PnaclCanOpenFile(non_ascii, &out_path));
+}