Add placeholder text for unsupported plug-ins.

chrome/renderer/plugins/plugin_placeholder.cc

Index: chrome/renderer/plugins/plugin_placeholder.cc
diff --git a/chrome/renderer/plugins/plugin_placeholder.cc b/chrome/renderer/plugins/plugin_placeholder.cc
index 4590a92726955f4caa19e69da8ff9c808b56b6a8..0a1e2b0ac31aad3077a91015484290e009d191ea 100644
--- a/chrome/renderer/plugins/plugin_placeholder.cc
+++ b/chrome/renderer/plugins/plugin_placeholder.cc
@@ -109,7 +109,12 @@ PluginPlaceholder* PluginPlaceholder::CreateMissingPlugin(
           IDR_BLOCKED_PLUGIN_HTML));
 
   DictionaryValue values;
+#if defined(ENABLE_PLUGIN_INSTALLATION)
   values.SetString("message", l10n_util::GetStringUTF8(IDS_PLUGIN_SEARCHING));
+#else
+  values.SetString("message",
+      l10n_util::GetStringUTF8(IDS_PLUGIN_NOT_SUPPORTED));
+#endif
 
   std::string html_data =
       jstemplate_builder::GetI18nTemplateHtml(template_html, &values);
@@ -122,8 +127,6 @@ PluginPlaceholder* PluginPlaceholder::CreateMissingPlugin(
   RenderThread::Get()->Send(new ChromeViewHostMsg_FindMissingPlugin(
       missing_plugin->routing_id(), missing_plugin->CreateRoutingId(),
       params.mimeType.utf8()));
-#else
-  missing_plugin->OnDidNotFindMissingPlugin();
 #endif
   return missing_plugin;
 }