Pepper Flash settings integration: implement "deauthorize content licenses".

chrome/browser/pepper_flash_settings_manager.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.
 
 #ifndef CHROME_BROWSER_PEPPER_FLASH_SETTINGS_MANAGER_H_
 #define CHROME_BROWSER_PEPPER_FLASH_SETTINGS_MANAGER_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 
 class PluginPrefs;
 class PrefService;
 
+namespace content {
+class BrowserContext;
+}
+
 namespace webkit {
 struct WebPluginInfo;
 }
 
 // PepperFlashSettingsManager communicates with a PPAPI broker process to
 // read/write Pepper Flash settings.
 class PepperFlashSettingsManager {
  public:
+  class Client {
+   public:
+    virtual ~Client() {}
+
+    virtual void OnDeauthorizeContentLicensesCompleted(uint32 request_id,
+                                                       bool success) = 0;
+  };
+
+  // |client| must outlive this object. It is guaranteed that |client| won't
+  // receive any notifications after this object goes away.
+  PepperFlashSettingsManager(Client* client,
+                             content::BrowserContext* browser_context);
+  ~PepperFlashSettingsManager();
+
   // |plugin_info| will be updated if it is not NULL and the method returns
   // true.
   static bool IsPepperFlashInUse(PluginPrefs* plugin_prefs,
                                  webkit::WebPluginInfo* plugin_info);
 
   static void RegisterUserPrefs(PrefService* prefs);
 
+  // Requests to deauthorize content licenses.
+  // Client::OnDeauthorizeContentLicensesCompleted() will be called when the
+  // operation is completed.
+  // The return value is the same as the request ID passed into
+  // Client::OnDeauthorizeContentLicensesCompleted().
+  uint32 DeauthorizeContentLicenses();
+
  private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(PepperFlashSettingsManager);
+  // Core does most of the work. It is ref-counted so that its lifespan can be
+  // independent of the containing object's:
+  // - The manager can be deleted on the UI thread while the core still being
+  // used on the I/O thread.
+  // - The manager can delete the core when it encounters errors and create
+  // another one to handle new requests.
+  class Core;
+
+  uint32 GetNextRequestId();
+
+  void EnsureCoreExists();
+
+  // Notified by |core_| when an error occurs.
+  void OnError();
+
+  // |client_| is not owned by this object and must outlive it.
+  Client* client_;
+
+  // The browser context for the profile.
+  content::BrowserContext* browser_context_;
+
+  scoped_refptr<Core> core_;
+
+  uint32 next_request_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperFlashSettingsManager);
 };
 
 #endif  // CHROME_BROWSER_PEPPER_FLASH_SETTINGS_MANAGER_H_