Relanding: Add js api for hosted/packaged apps to request notification authorization

chrome/browser/extensions/app_notify_channel_setup.h

Index: chrome/browser/extensions/app_notify_channel_setup.h
diff --git a/chrome/browser/extensions/app_notify_channel_setup.h b/chrome/browser/extensions/app_notify_channel_setup.h
new file mode 100644
index 0000000000000000000000000000000000000000..c44f8f11d4520b75998072aaf495613593a836e4
--- /dev/null
+++ b/chrome/browser/extensions/app_notify_channel_setup.h
@@ -0,0 +1,52 @@
+// 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_EXTENSIONS_APP_NOTIFY_CHANNEL_SETUP_H_
+#define CHROME_BROWSER_EXTENSIONS_APP_NOTIFY_CHANNEL_SETUP_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "googleurl/src/gurl.h"
+
+// This class uses the browser login credentials to fetch a channel ID for an
+// app to use when sending server push notifications.
+class AppNotifyChannelSetup
+    : public base::RefCountedThreadSafe<AppNotifyChannelSetup> {
+ public:
+  class Delegate {
+   public:
+    // If successful, |channel_id| will be non-empty. On failure, |channel_id|
+    // will be empty and |error| will contain an error to report to the JS
+    // callback.
+    virtual void AppNotifyChannelSetupComplete(int request_id,
+                                               const std::string& channel_id,
+                                               const std::string& error) = 0;
+  };
+
+  AppNotifyChannelSetup(int request_id,
+                        const std::string& client_id,
+                        const GURL& requestor_url,
+                        base::WeakPtr<Delegate> delegate);
+
+  // This begins the process of fetching the channel id using the browser login
+  // credentials. If the user isn't logged in to chrome, this will first cause a
+  // prompt to appear asking the user to log in.
+  void Start();
+
+ private:
+  friend class base::RefCountedThreadSafe<AppNotifyChannelSetup>;
+
+  virtual ~AppNotifyChannelSetup();
+
+  void ReportResult(const std::string& channel_id, const std::string& error);
+
+  int request_id_;
+  std::string client_id_;
+  GURL requestor_url_;
+  base::WeakPtr<Delegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppNotifyChannelSetup);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_APP_NOTIFY_CHANNEL_SETUP_H_