clang/win: Fix most -Wunused-function warnings in Chromium code.

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 89 matching lines @@
 
 #if defined(OS_MACOSX)
 void NotifyPluginsOfActivation() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   for (PluginProcessHostIterator iter; !iter.Done(); ++iter)
     iter->OnAppActivation();
 }
 #endif
 
-#if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
+#if defined(OS_POSIX)
+#if !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 void NotifyPluginDirChanged(const base::FilePath& path, bool error) {
   if (error) {
     // TODO(pastarmovj): Add some sensible error handling. Maybe silently
     // stopping the watcher would be enough. Or possibly restart it.
     NOTREACHED();
     return;
   }
   VLOG(1) << "Watched path changed: " << path.value();
   // Make the plugin list update itself
   PluginList::Singleton()->RefreshPlugins();
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&PluginService::PurgePluginListCache,
                  static_cast<BrowserContext*>(NULL), false));
 }
-#endif
+#endif  // !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 
 void ForwardCallback(base::SingleThreadTaskRunner* target_task_runner,
                      const PluginService::GetPluginsCallback& callback,
                      const std::vector<WebPluginInfo>& plugins) {
   target_task_runner->PostTask(FROM_HERE, base::Bind(callback, plugins));
 }
+#endif  // defined(OS_POSIX)
 
 }  // namespace
 
 // static
 PluginService* PluginService::GetInstance() {
   return PluginServiceImpl::GetInstance();
 }
 
 void PluginService::PurgePluginListCache(BrowserContext* browser_context,
                                          bool reload_pages) {
@@ skipping 721 matching lines @@
 #endif
 
 bool PluginServiceImpl::PpapiDevChannelSupported(
     BrowserContext* browser_context,
     const GURL& document_url) {
   return GetContentClient()->browser()->IsPluginAllowedToUseDevChannelAPIs(
       browser_context, document_url);
 }
 
 }  // namespace content