Fix incorect tests against INVALID_FILE_HANDLE, as pointed out by cpu on chrome-team.

base/file_util_win.cc

Index: base/file_util_win.cc
diff --git a/base/file_util_win.cc b/base/file_util_win.cc
index 33491eddcc40c81e2834bc9bf3a463bfa32ae6d0..aa965bf0982d39b3c096fbda0b8d11ae2ed03cd3 100644
--- a/base/file_util_win.cc
+++ b/base/file_util_win.cc
@@ -976,7 +976,7 @@ bool NormalizeFilePath(const FilePath& path, FilePath* real_path) {
                    OPEN_EXISTING,
                    FILE_ATTRIBUTE_NORMAL,
                    NULL));
-  if (path_handle == INVALID_HANDLE_VALUE)
+  if (!path_handle.IsValid())
     return false;
 
   // In Vista, GetFinalPathNameByHandle() would give us the real path
@@ -1002,7 +1002,7 @@ bool NormalizeFilePath(const FilePath& path, FilePath* real_path) {
                           1, // Just one byte.  No need to look at the data.
                           NULL));
 
-  if (file_map_handle == INVALID_HANDLE_VALUE)
+  if (!file_map_handle.IsValid())
     return false;
 
   // Use a view of the file to get the path to the file.