Enable NPAPI if policy has plugin policies.

content/browser/plugin_service_impl.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 "content/browser/plugin_service_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ skipping 771 matching lines @@
 void PluginServiceImpl::UnregisterInternalPlugin(const base::FilePath& path) {
   PluginList::Singleton()->UnregisterInternalPlugin(path);
 }
 
 void PluginServiceImpl::GetInternalPlugins(
     std::vector<WebPluginInfo>* plugins) {
   PluginList::Singleton()->GetInternalPlugins(plugins);
 }
 
 bool PluginServiceImpl::NPAPIPluginsSupported() {
+  if (npapi_plugins_enabled_)
+    return true;
+
   static bool command_line_checked = false;
 
   if (!command_line_checked) {
 #if defined(OS_WIN) || defined(OS_MACOSX)
     const base::CommandLine* command_line =
         base::CommandLine::ForCurrentProcess();
     npapi_plugins_enabled_ = command_line->HasSwitch(switches::kEnableNpapi);
     NPAPIPluginStatus status =
         npapi_plugins_enabled_ ? NPAPI_STATUS_ENABLED : NPAPI_STATUS_DISABLED;
 #else
     NPAPIPluginStatus status = NPAPI_STATUS_UNSUPPORTED;
 #endif
     UMA_HISTOGRAM_ENUMERATION("Plugin.NPAPIStatus", status,
         NPAPI_STATUS_ENUM_COUNT);
   }
 
   return npapi_plugins_enabled_;
 }
 
 void PluginServiceImpl::DisablePluginsDiscoveryForTesting() {
   PluginList::Singleton()->DisablePluginsDiscovery();
 }
 
-void PluginServiceImpl::EnableNpapiPluginsForTesting() {
+void PluginServiceImpl::EnableNpapiPlugins() {
   npapi_plugins_enabled_ = true;
+  RefreshPlugins();
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&PluginService::PurgePluginListCache,
+                 static_cast<BrowserContext*>(NULL), false));
 }
 
 #if defined(OS_MACOSX)
 void PluginServiceImpl::AppActivated() {
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(&NotifyPluginsOfActivation));
 }
 #elif defined(OS_WIN)
 
 bool GetPluginPropertyFromWindow(
@@ skipping 37 matching lines @@
 #endif
 
 bool PluginServiceImpl::PpapiDevChannelSupported(
     BrowserContext* browser_context,
     const GURL& document_url) {
   return content::GetContentClient()->browser()->
       IsPluginAllowedToUseDevChannelAPIs(browser_context, document_url);
 }
 
 }  // namespace content