Remove stale code to delete the metro user data dir. It never shipped.

chrome/installer/util/product.h

Index: chrome/installer/util/product.h
diff --git a/chrome/installer/util/product.h b/chrome/installer/util/product.h
index 4e70b424b51f5a8312aac2def9fbd5256abb0367..57699286e4f6d6a6543b93b7ad7a588e27f94fc5 100644
--- a/chrome/installer/util/product.h
+++ b/chrome/installer/util/product.h
@@ -81,15 +81,12 @@ class Product {
       return options_.erase(option) != 0;
   }
 
-  // Returns the path(s) to the directory that holds the user data (primary
-  // and, if applicable to |dist|, alternate).  This is always inside a user's
-  // local application data folder (e.g., "AppData\Local or "Local
-  // Settings\Application Data" in %USERPROFILE%). Note that these are the
-  // defaults and do not take into account that they can be overriden with a
-  // command line parameter.  |paths| may be empty on return, but is guaranteed
-  // not to contain empty paths otherwise. If more than one path is returned,
-  // they are guaranteed to be siblings.
-  void GetUserDataPaths(std::vector<base::FilePath>* paths) const;
+  // Returns the path to the directory that holds the user data.  This is always
+  // inside a user's local application data folder (e.g., "AppData\Local or
+  // "Local Settings\Application Data" in %USERPROFILE%). Note that this is the
+  // default user data directory and does not take into account that it can be
+  // overriden with a command line parameter.
+  base::FilePath GetUserDataPath() const;
 
   // Launches Chrome without waiting for it to exit.
   bool LaunchChrome(const base::FilePath& application_path) const;