Fixed file_version_info so that it finds Mac values correctly.

chrome/common/chrome_version_info.h

Index: chrome/common/chrome_version_info.h
diff --git a/chrome/common/chrome_version_info.h b/chrome/common/chrome_version_info.h
index 0ec911e10282135a9df632b406bf749e0665ee80..b78524928bef8bd7eebc7ea99660b822ab8dd680 100644
--- a/chrome/common/chrome_version_info.h
+++ b/chrome/common/chrome_version_info.h
@@ -22,12 +22,6 @@ class VersionInfo {
   VersionInfo();
   ~VersionInfo();
 
-  // In the rare case where we fail to get the version info,
-  // is_valid() will return false.  The other functions will return
-  // the empty string in this case, so it's not harmful if you don't
-  // check is_valid().
-  bool is_valid() const;
-
   // E.g. "Chromium" or "Google Chrome".
   std::string Name() const;