Bugfixes for recent PluginGroup refactoring.

base/version.cc

Index: base/version.cc
diff --git a/base/version.cc b/base/version.cc
index fe224eb8662ffb8ff8575c35f4e5adbd68dc9bc0..6ad0cbe10971c6c1994e1e146548205adb8b8710 100644
--- a/base/version.cc
+++ b/base/version.cc
@@ -4,6 +4,8 @@
 
 #include "base/version.h"
 
+#include <algorithm>
+
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
@@ -32,6 +34,14 @@ Version::Version() : is_valid_(false) {}
 
 Version::~Version() {}
 
+Version* Version::Clone() const {
+  DCHECK(is_valid_);
+  Version* copy = new Version();
+  copy->components_ = components_;
+  copy->is_valid_ = true;
+  return copy;
+}
+
 bool Version::Equals(const Version& that) const {
   DCHECK(is_valid_);
   DCHECK(that.is_valid_);