Update all users of base::Version to explicitly specify the namespace, and clean up the header.

content/browser/plugin_data_remover_impl.cc

Index: content/browser/plugin_data_remover_impl.cc
diff --git a/content/browser/plugin_data_remover_impl.cc b/content/browser/plugin_data_remover_impl.cc
index 670d80dd4b61a80d5e61589e21114e4293861149..79e291f9a4a0589d156056e992e2a6b1741d8788 100644
--- a/content/browser/plugin_data_remover_impl.cc
+++ b/content/browser/plugin_data_remover_impl.cc
@@ -46,10 +46,10 @@ void PluginDataRemover::GetSupportedPlugins(
   std::vector<WebPluginInfo> plugins;
   PluginService::GetInstance()->GetPluginInfoArray(
       GURL(), kFlashPluginSwfMimeType, allow_wildcard, &plugins, NULL);
-  Version min_version(kMinFlashVersion);
+  base::Version min_version(kMinFlashVersion);
   for (std::vector<WebPluginInfo>::iterator it = plugins.begin();
        it != plugins.end(); ++it) {
-    Version version;
+    base::Version version;
     WebPluginInfo::CreateVersionFromString(it->version, &version);
     if (version.IsValid() && min_version.CompareTo(version) == -1)
       supported_plugins->push_back(*it);