Block NPAPI plug-ins in Metro mode instead of not loading them at all.

chrome/browser/renderer_host/plugin_info_message_filter.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/plugin_info_message_filter.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/plugins/plugin_finder.h"
 #include "chrome/browser/plugins/plugin_metadata.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/browser/plugin_service_filter.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/plugins/npapi/plugin_list.h"
 
+#if defined(OS_WIN)
+#include "base/win/metro.h"
+#endif
+
 using content::PluginService;
 using webkit::WebPluginInfo;
 
 PluginInfoMessageFilter::Context::Context(int render_process_id,
                                           Profile* profile)
     : render_process_id_(render_process_id),
       resource_context_(profile->GetResourceContext()),
       host_content_settings_map_(profile->GetHostContentSettingsMap()) {
   allow_outdated_plugins_.Init(prefs::kPluginsAllowOutdated,
                                profile->GetPrefs(), NULL);
@@ skipping 93 matching lines @@
 
   ChromeViewHostMsg_GetPluginInfo::WriteReplyParams(reply_msg, output);
   Send(reply_msg);
 }
 
 void PluginInfoMessageFilter::Context::DecidePluginStatus(
     const GetPluginInfo_Params& params,
     const WebPluginInfo& plugin,
     const PluginMetadata* plugin_metadata,
     ChromeViewHostMsg_GetPluginInfo_Status* status) const {
+#if defined(OS_WIN)
+  if (plugin.type == WebPluginInfo::PLUGIN_TYPE_NPAPI &&
+      base::win::IsMetroProcess()) {
+    status->value =
+        ChromeViewHostMsg_GetPluginInfo_Status::kNPAPINotSupported;
+    return;
+  }
+#endif
+
   ContentSetting plugin_setting = CONTENT_SETTING_DEFAULT;
   bool uses_default_content_setting = true;
   // Check plug-in content settings. The primary URL is the top origin URL and
   // the secondary URL is the plug-in URL.
   GetPluginContentSetting(plugin, params.top_origin_url, params.url,
                           plugin_metadata->identifier(), &plugin_setting,
                           &uses_default_content_setting);
   DCHECK(plugin_setting != CONTENT_SETTING_DEFAULT);
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
@@ skipping 119 matching lines @@
           policy_url, plugin_url, CONTENT_SETTINGS_TYPE_PLUGINS, std::string(),
           &info));
     }
   }
   *setting = content_settings::ValueToContentSetting(value.get());
   *uses_default_content_setting =
       !uses_plugin_specific_setting &&
       info.primary_pattern == ContentSettingsPattern::Wildcard() &&
       info.secondary_pattern == ContentSettingsPattern::Wildcard();
 }