Add PluginServiceFilter interface.

chrome/browser/chrome_plugin_service_helper.h

+// Copyright (c) 2011 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_CHROME_PLUGIN_SERVICE_HELPER_H_
+#define CHROME_BROWSER_CHROME_PLUGIN_SERVICE_HELPER_H_
+#pragma once
+
+#include <vector>
+
+#include "base/hash_tables.h"
+#include "base/file_path.h"
+#include "base/memory/singleton.h"
+#include "base/synchronization/lock.h"
+#include "content/browser/plugin_service.h"
+#include "content/common/notification_observer.h"
+#include "content/common/notification_registrar.h"
+#include "googleurl/src/gurl.h"
+#include "webkit/plugins/npapi/webplugininfo.h"
+
+// This class must be created (by calling the |GetInstance| method) on the UI
+// thread, but is safe to use on any thread after that.
+class ChromePluginServiceHelper : public NotificationObserver {

[jam, 2011/08/01 03:25:44]

we can make this also implement the filter interface (once it's not owned by
content). FindOverriddenPluginForTab() and indRestrictedURLForPlugin) can be
private then.

+ public:
+  struct OverriddenPlugin {

[jam, 2011/08/01 03:25:44]

while you're cleaning this up, what do you think of making OverridePlugin a
private struct that we don't need to expose, and OverridePluginForTab() should
just take its members directly?

[Bernhard Bauer, 2011/08/01 16:06:12]

Sounds good. Done.

+    int render_process_id;
+    int render_view_id;
+    GURL url;
+    webkit::npapi::WebPluginInfo plugin;
+  };
+
+  static ChromePluginServiceHelper* GetInstance();
+
+  // Overrides the plugin lookup mechanism for a given tab and object URL to use
+  // a specifc plugin.
+  void OverridePluginForTab(const OverriddenPlugin& plugin);
+
+  // Finds the overridden plugin for a given tab and object URL and returns a
+  // copy, or NULL if no overridden plugin was found.
+  // Caller takes ownership.
+  webkit::npapi::WebPluginInfo* FindOverriddenPluginForTab(
+      int render_process_id,
+      int render_view_id,
+      const GURL& url);
+
+  // Restricts the given plugin to the the scheme and host of the given url.
+  // Call with an empty url to reset this.
+  void RestrictPluginToUrl(const FilePath& plugin_path, const GURL& url);
+
+  // Returns the URL a given plugin is restricted to, or an empty URL if it can
+  // be used on all URLs.
+  GURL FindRestrictedURLForPlugin(const FilePath& plugin_path);
+
+  // Creates a new plugin filter. Caller takes ownership.
+  // This method should only be called from the IO thread.
+  PluginService::Filter* CreatePluginFilter(
+      int render_process_id,
+      int render_view_id,
+      const content::ResourceContext& resource_context,
+      const GURL& url,
+      const GURL& policy_url);
+
+ private:
+  friend struct DefaultSingletonTraits<ChromePluginServiceHelper>;
+
+  ChromePluginServiceHelper();
+  virtual ~ChromePluginServiceHelper();
+
+  // NotificationObserver implementation:
+  virtual void Observe(int type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  NotificationRegistrar registrar_;
+
+  base::Lock lock_;  // Guards access to member variables.
+  // Map of plugin paths to the origin they are restricted to.
+  typedef base::hash_map<FilePath, GURL> RestrictedPluginMap;
+  RestrictedPluginMap restricted_plugins_;
+
+  std::vector<OverriddenPlugin> overridden_plugins_;
+};
+
+#endif  // CHROME_BROWSER_CHROME_PLUGIN_SERVICE_HELPER_H_