Comparison and streaming operators for base::Version

base/version.cc

Index: base/version.cc
diff --git a/base/version.cc b/base/version.cc
index 3677b731980beb8328a1b6b0633c791cd1dee44e..496ca8d57827c310f5ecccc5f1cb83a72130ecc9 100644
--- a/base/version.cc
+++ b/base/version.cc
@@ -151,12 +151,6 @@ int Version::CompareToWildcardString(const std::string& wildcard_string) const {
   return 0;
 }
 
-bool Version::Equals(const Version& that) const {
-  DCHECK(IsValid());
-  DCHECK(that.IsValid());
-  return (CompareTo(that) == 0);
-}
-
 int Version::CompareTo(const Version& other) const {
   DCHECK(IsValid());
   DCHECK(other.IsValid());
@@ -175,4 +169,32 @@ const std::string Version::GetString() const {
   return version_str;
 }
 
+bool operator==(const Version& v1, const Version& v2) {
+  return v1.CompareTo(v2) == 0;
+}
+
+bool operator!=(const Version& v1, const Version& v2) {
+  return !(v1 == v2);
+}
+
+bool operator<(const Version& v1, const Version& v2) {
+  return v1.CompareTo(v2) < 0;
+}
+
+bool operator<=(const Version& v1, const Version& v2) {
+  return v1.CompareTo(v2) <= 0;
+}
+
+bool operator>(const Version& v1, const Version& v2) {
+  return v1.CompareTo(v2) > 0;
+}
+
+bool operator>=(const Version& v1, const Version& v2) {
+  return v1.CompareTo(v2) >= 0;
+}
+
+std::ostream& operator<<(std::ostream& stream, const Version& v) {
+  return stream << v.GetString();
+}
+
 }  // namespace base