Implement restart-required message on Linux.

chrome/browser/plugins/plugin_info_message_filter.cc

Index: chrome/browser/plugins/plugin_info_message_filter.cc
diff --git a/chrome/browser/plugins/plugin_info_message_filter.cc b/chrome/browser/plugins/plugin_info_message_filter.cc
index c1043375281defa789561245fa3d9432502ae97b..31817cd8b907a06960a2d7f3716a976d66dc3e22 100644
--- a/chrome/browser/plugins/plugin_info_message_filter.cc
+++ b/chrome/browser/plugins/plugin_info_message_filter.cc
@@ -471,6 +471,12 @@ void PluginInfoMessageFilter::ComponentPluginLookupDone(
   if (cus_plugin_info) {
     output->status =
         ChromeViewHostMsg_GetPluginInfo_Status::kComponentUpdateRequired;
+#if defined(OS_LINUX)
+    if (cus_plugin_info->version != base::Version("0")) {
+      output->status =
+          ChromeViewHostMsg_GetPluginInfo_Status::kRestartRequired;
+    }
+#endif  // defined(OS_LINUX)
     plugin_metadata.reset(new PluginMetadata(
         cus_plugin_info->id, cus_plugin_info->name, false, GURL(), GURL(),
         base::ASCIIToUTF16(cus_plugin_info->id), std::string()));