[Chromoting] Hook up host talkgadget policy checks.

remoting/host/connection_block_checker.h

Index: remoting/host/connection_block_checker.h
diff --git a/remoting/host/connection_block_checker.h b/remoting/host/connection_block_checker.h
new file mode 100644
index 0000000000000000000000000000000000000000..1b6a71a4c087914376d9414538d688f2da1ddb6c
--- /dev/null
+++ b/remoting/host/connection_block_checker.h
@@ -0,0 +1,48 @@
+// 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 REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_
+#define REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_
+
+#include "net/url_request/url_fetcher_delegate.h"
+
+#include "base/callback.h"
+
+namespace remoting {
+
+class ChromotingHostContext;
+
+class ConnectionBlockChecker : public net::URLFetcherDelegate {
+ public:
+  ConnectionBlockChecker(ChromotingHostContext* context,
+                         std::string talkgadget_prefix,
+                         const base::Callback<void(bool)>& callback);

[Sergey Ulanov, 2012/08/29 20:10:29]

it would be cleaner to pass callback to CheckStatus() method - that will allow
to use different callbacks for each check (e.g. in case CheckStatus() caller
needs to pass some additional info to the callback).

[garykac, 2012/08/29 22:30:51]

Done.

+  virtual ~ConnectionBlockChecker();
+
+  // Initiates a cecks the verify that there is a valid connection to the host
+  // talkgadget. Calls |callback_| with the result.

[Sergey Ulanov, 2012/08/29 20:10:29]

nit: Calls the the |callback| specified in the constructor. 
callback_ is private so it's better not to mention it when describing public
interface.

[garykac, 2012/08/29 22:30:51]

Done.

+  void CheckStatus();
+
+ private:
+  // net::URLFetcherDelegate interface.
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;

[Sergey Ulanov, 2012/08/29 20:10:29]

interface implementation must be public.

[garykac, 2012/08/29 22:30:51]

Done.

+
+  ChromotingHostContext* context_;
+
+  // URL fetcher used to verify access to the host talkgadget.
+  scoped_ptr<net::URLFetcher> url_fetcher_;
+
+  // The string pre-pended to '.talkgadget.google.com' to create the full
+  // talkgadget domain name for the host.
+  std::string talkgadget_prefix_;
+
+  // Called with the results of the connection check.
+  const base::Callback<void(bool)> callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConnectionBlockChecker);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_