VariationsService now supports wildcard in min/max version

base/version.h

Index: base/version.h
===================================================================
--- base/version.h	(revision 145458)
+++ base/version.h	(working copy)
@@ -30,6 +30,12 @@
   // Returns true if the object contains a valid version number.
   bool IsValid() const;
 
+  // Returns true if the version wildcard string is valid. The version wildcard
+  // string may end with ".*" (e.g. 1.2.*, 1.*). Any other arrangement with "*"
+  // is invalid (e.g. 1.*.3 or 1.2.3*). This functions defaults to standard
+  // Version behavior (IsValid) if no wildcard is present.
+  static bool IsValidWildcardString(const std::string& wildcard_string);
+
   // Commonly used pattern. Given a valid version object, compare if a
   // |version_str| results in a newer version. Returns true if the
   // string represents valid version and if the version is greater than
@@ -50,6 +56,12 @@
   // Returns -1, 0, 1 for <, ==, >.
   int CompareTo(const Version& other) const;
 
+  // Given a valid version object, compare if a |wildcard_string| results in a
+  // newer version. This function will default to CompareTo if the string does
+  // not end in wildcard sequence ".*". IsValidWildcard(wildcard_string) must be
+  // true before using this function.
+  int CompareToWildcardString(const std::string& wildcard_string) const;
+
   // Return the string representation of this version.
   const std::string GetString() const;