VariationsService now supports wildcard in min/max version

base/version.h

Index: base/version.h
===================================================================
--- base/version.h	(revision 142705)
+++ base/version.h	(working copy)
@@ -30,6 +30,10 @@
   // Returns true if the object contains a valid version number.
   bool IsValid() const;
 
+  // Returns true if the version string is valid. In this version, the string
+  // can end with a wildcard character.
+  static bool IsValidWildcard(const std::string& version_str);
+
   // 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 +54,11 @@
   // Returns -1, 0, 1 for <, ==, >.
   int CompareTo(const Version& other) const;
 
+  // Given a valid version object, compare if a |version_str| results in a
+  // newer version. This function will default to CompareTo if the string does
+  // not end in a wildcard character "*".
+  int CompareToWildcard(const std::string& version_str) const;
+
   // Return the string representation of this version.
   const std::string GetString() const;