Allow native (nt-style) paths to be used for sandbox policy specification

1- bypass fixup when adding the path into the policy
2- make SameObject() do case-insensitive perfect match

BUG=50774
TEST= unit test included


Review URL: http://codereview.chromium.org/3092014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55329 0039d316-1c4b-4281-b951-d872f2087c98

diff --git a/sandbox/src/win_utils.h b/sandbox/src/win_utils.h
index 8bc44b7..a80bb81 100644
--- a/sandbox/src/win_utils.h
+++ b/sandbox/src/win_utils.h

@@ -15,6 +15,9 @@
 const wchar_t kNTPrefix[] = L"\\??\\";
 const size_t kNTPrefixLen = arraysize(kNTPrefix) - 1;
 
+const wchar_t kNTObjManPrefix[] = L"\\Device\\";
+const size_t kNTObjManPrefixLen = arraysize(kNTObjManPrefix) - 1;
+
 // Automatically acquires and releases a lock when the object is
 // is destroyed.
 class AutoLock {
@@ -74,9 +77,13 @@
 // Returns true if the handle corresponds to the object pointed by this path.
 bool SameObject(HANDLE handle, const wchar_t* full_path);
 
-// Resolves a handle to a path. Returns true if the handle can be resolved.
+// Resolves a handle to an nt path. Returns true if the handle can be resolved.
 bool GetPathFromHandle(HANDLE handle, std::wstring* path);
 
+// Resolves a win32 path to an nt path using GetPathFromHandle. The path must
+// exist. Returs true if the translation was succesful.
+bool GetNtPathFromWin32Path(const std::wstring& path, std::wstring* nt_path);
+
 // Translates a reserved key name to its handle.
 // For example "HKEY_LOCAL_MACHINE" returns HKEY_LOCAL_MACHINE.
 // Returns NULL if the name does not represent any reserved key name.