Implement the chrome.passwordsPrivate API.

chrome/browser/extensions/api/passwords_private/passwords_private_event_router.h

Index: chrome/browser/extensions/api/passwords_private/passwords_private_event_router.h
diff --git a/chrome/browser/extensions/api/passwords_private/passwords_private_event_router.h b/chrome/browser/extensions/api/passwords_private/passwords_private_event_router.h
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index 0000000000000000000000000000000000000000..188f1d1471881b2f0eb466c6b287228654099b91
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+++ b/chrome/browser/extensions/api/passwords_private/passwords_private_event_router.h
@@ -0,0 +1,76 @@
+// Copyright 2015 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_EXTENSIONS_API_PASSWORDS_PRIVATE_PASSWORDS_PRIVATE_EVENT_ROUTER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_PASSWORDS_PRIVATE_PASSWORDS_PRIVATE_EVENT_ROUTER_H_
+
+#include "chrome/browser/extensions/api/passwords_private/passwords_private_delegate.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "extensions/browser/event_router.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace extensions {
+
+// An event router that observes changes to saved passwords and password
+// exceptions and notifies listeners to the onSavedPasswordsListChanged and
+// onPasswordExceptionsListChanged events of changes.
+class PasswordsPrivateEventRouter :
+    public KeyedService,
+    public EventRouter::Observer,
+    public PasswordsPrivateDelegate::Observer {
+ public:
+  static PasswordsPrivateEventRouter* Create(
+      content::BrowserContext* browser_context);
+  ~PasswordsPrivateEventRouter() override;
+
+ protected:
+  explicit PasswordsPrivateEventRouter(content::BrowserContext* context);
+
+  // KeyedService overrides:
+  void Shutdown() override;
+
+  // EventRouter::Observer overrides:
+  void OnListenerAdded(const EventListenerInfo& details) override;
+  void OnListenerRemoved(const EventListenerInfo& details) override;
+
+  // PasswordsPrivateDelegate::Observer overrides:
+  void OnSavedPasswordsListChanged(const std::vector<linked_ptr<
+      api::passwords_private::PasswordUiEntry>>& entries) override;
+  void OnPasswordExceptionsListChanged(
+      const std::vector<std::string>& exceptions) override;
+  void OnPlaintextPasswordFetched(
+      const std::string& origin_url,
+      const std::string& username,
+      const std::string& plaintext_password) override;
+
+ private:
+  // Either listens or unlistens for changes to saved passwords, password
+  // exceptions, or the retrieval of plaintext passwords, depending on whether
+  // clients are listening to the passwordsPrivate API events.
+  void StartOrStopListeningForChanges();
+
+  void SendSavedPasswordListToListeners();
+  void SendPasswordExceptionListToListeners();
+
+  content::BrowserContext* context_;
+
+  EventRouter* event_router_;
+
+  // Cached parameters which are saved so that when new listeners are added, the
+  // most up-to-date lists can be sent to them immediately.
+  scoped_ptr<base::ListValue> cached_saved_password_parameters_;
+  scoped_ptr<base::ListValue> cached_password_exception_parameters_;
+
+  // Whether this class is currently listening for changes to password changes.
+  bool listening_;
+
+  DISALLOW_COPY_AND_ASSIGN(PasswordsPrivateEventRouter);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_PASSWORDS_PRIVATE_PASSWORDS_PRIVATE_EVENT_ROUTER_H_