Use PostTaskAndReplyWithResult in plugin_service_impl.cc.

content/browser/plugin_service_impl.h

 // 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.
 
 // This class responds to requests from renderers for the list of plugins, and
 // also a proxy object for plugin instances.
 
 #ifndef CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_
 
 #include "ppapi/features/features.h"
 
 #if !BUILDFLAG(ENABLE_PLUGINS)
 #error "Plugins should be enabled"
 #endif
 
 #include <map>
-#include <memory>
-#include <set>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "base/sequence_checker.h"
 #include "base/sequenced_task_runner.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/browser/ppapi_plugin_process_host.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/common/pepper_plugin_info.h"
 #include "ipc/ipc_channel_handle.h"
 #include "url/gurl.h"
 
 #if defined(OS_WIN)
 #include "base/win/registry.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 #include "base/files/file_path_watcher.h"
 #endif
 
-namespace base {
-class SingleThreadTaskRunner;
-}
-
 namespace content {
 class BrowserContext;
 class PluginServiceFilter;
 class ResourceContext;
 struct PepperPluginInfo;
 
 class CONTENT_EXPORT PluginServiceImpl
     : NON_EXPORTED_BASE(public PluginService) {
  public:
   // Returns the PluginServiceImpl singleton.
@@ skipping 13 matching lines @@
                      const url::Origin& main_frame_origin,
                      const std::string& mime_type,
                      bool allow_wildcard,
                      bool* is_stale,
                      WebPluginInfo* info,
                      std::string* actual_mime_type) override;
   bool GetPluginInfoByPath(const base::FilePath& plugin_path,
                            WebPluginInfo* info) override;
   base::string16 GetPluginDisplayNameByPath(
       const base::FilePath& path) override;
-  void GetPlugins(const GetPluginsCallback& callback) override;
+  void GetPlugins(GetPluginsCallback callback) override;
   PepperPluginInfo* GetRegisteredPpapiPluginInfo(
       const base::FilePath& plugin_path) override;
   void SetFilter(PluginServiceFilter* filter) override;
   PluginServiceFilter* GetFilter() override;
   bool IsPluginUnstable(const base::FilePath& plugin_path) override;
   void RefreshPlugins() override;
   void RegisterInternalPlugin(const WebPluginInfo& info,
                               bool add_at_beginning) override;
   void UnregisterInternalPlugin(const base::FilePath& path) override;
   void GetInternalPlugins(std::vector<WebPluginInfo>* plugins) override;
@@ skipping 41 matching lines @@
   // has been started by this service. Returns NULL if no process has been
   // started.
   PpapiPluginProcessHost* FindPpapiPluginProcess(
       const base::FilePath& plugin_path,
       const base::FilePath& profile_data_directory);
   PpapiPluginProcessHost* FindPpapiBrokerProcess(
       const base::FilePath& broker_path);
 
   void RegisterPepperPlugins();
 
-  // Run on the blocking pool to load the plugins synchronously.
-  void GetPluginsInternal(base::SingleThreadTaskRunner* target_task_runner,
-                          const GetPluginsCallback& callback);
+  // Loads the plugins synchronously in a thread pool.
+  std::vector<WebPluginInfo> GetPluginsInternal();
 
   std::vector<PepperPluginInfo> ppapi_plugins_;
 
   // Weak pointer; outlives us.
   PluginServiceFilter* filter_;
 
   // Used to load plugins from disk.
   scoped_refptr<base::SequencedTaskRunner> plugin_list_task_runner_;
 
   // Used to verify that loading plugins from disk is done sequentially.
   base::SequenceChecker plugin_list_sequence_checker_;
 
   // Used to detect if a given plugin is crashing over and over.
   std::map<base::FilePath, std::vector<base::Time> > crash_times_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_