Show missing plug-in infobar only if a plug-in is available.

chrome/default_plugin/plugin_installer_base.cc

Index: chrome/default_plugin/plugin_installer_base.cc
diff --git a/chrome/default_plugin/plugin_installer_base.cc b/chrome/default_plugin/plugin_installer_base.cc
index 9488b4d4d684d0a79c54bdb65dd8f95c054a5df8..8326bcb3512a9cc2d26f77a9e9e2236686f376ff 100644
--- a/chrome/default_plugin/plugin_installer_base.cc
+++ b/chrome/default_plugin/plugin_installer_base.cc
@@ -16,9 +16,9 @@ PluginInstallerBase::PluginInstallerBase()
 PluginInstallerBase::~PluginInstallerBase() {
 }
 
-bool PluginInstallerBase::Initialize(void* module_handle, NPP instance,
-                                     NPMIMEType mime_type, int16 argc,
-                                     char* argn[], char* argv[]) {
+void PluginInstallerBase::SetRoutingIds(int16 argc,
+                                        char* argn[],
+                                        char* argv[]) {
   for (int16_t index = 0; index < argc; ++index) {
     if (!base::strncasecmp(argn[index],
                            content::kDefaultPluginRenderProcessId,
@@ -30,5 +30,4 @@ bool PluginInstallerBase::Initialize(void* module_handle, NPP instance,
       base::StringToInt(argv[index], &render_view_id_);
     }
   }
-  return true;
 }