Add FilePath support to FileVersionInfo, fix Mac memory issues.

base/file_version_info.h

Index: base/file_version_info.h
===================================================================
--- base/file_version_info.h	(revision 7212)
+++ base/file_version_info.h	(working copy)
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/file_path.h"
 #include "base/scoped_ptr.h"
 
 #ifdef OS_MACOSX
@@ -27,6 +28,9 @@
   // Creates a FileVersionInfo for the specified path. Returns NULL if something
   // goes wrong (typically the file does not exit or cannot be opened). The
   // returned object should be deleted when you are done with it.
+  static FileVersionInfo* CreateFileVersionInfo(const FilePath& file_path);
+  // This version, taking a wstring, is deprecated and only kept around
+  // until we can fix all callers.
   static FileVersionInfo* CreateFileVersionInfo(const std::wstring& file_path);
 
   // Creates a FileVersionInfo for the current module. Returns NULL in case
@@ -77,7 +81,6 @@
   VS_FIXEDFILEINFO* fixed_file_info_;
 #elif defined(OS_MACOSX)
   explicit FileVersionInfo(NSBundle *bundle);
-  explicit FileVersionInfo(const std::wstring& file_path);
   
   NSBundle *bundle_;
 #endif