Plumb network stack information about existence of cached copy

net/http/failing_http_transaction_factory.h

Index: net/http/failing_http_transaction_factory.h
diff --git a/net/http/failing_http_transaction_factory.h b/net/http/failing_http_transaction_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..52d83528034a3956655d1538ab12cea279c9ca1b
--- /dev/null
+++ b/net/http/failing_http_transaction_factory.h
@@ -0,0 +1,49 @@
+// Copyright 2014 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 NET_FAILING_HTTP_TRANSACTION_FACTORY_H_
+#define NET_FAILING_HTTP_TRANSACTION_FACTORY_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "net/base/completion_callback.h"

[mmenke, 2014/01/28 17:27:23]

Not needed.

[Randy Smith (Not in Mondays), 2014/01/28 22:52:59]

Done.

+#include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
+#include "net/http/http_transaction.h"
+#include "net/http/http_transaction_factory.h"
+
+namespace net {
+
+class AuthCredentials;
+class BoundNetLog;
+class HttpCache;
+class HttpRequestHeaders;
+class IOBuffer;
+class URLRequestContextGetter;
+class X509Certificate;
+
+struct HttpRequestInfo;

[mmenke, 2014/01/28 17:27:23]

Should probably add a forward declaration of HttpNetworkSession.

[mmenke, 2014/01/28 17:27:23]

Of all these forward declarations, only HttpCache is needed.  Some of the others
should  probably go into the cc file, though.

[Randy Smith (Not in Mondays), 2014/01/28 22:52:59]

Done.

[Randy Smith (Not in Mondays), 2014/01/28 22:52:59]

Right, because the transaction declaration used to be here.  Good point.  Done.

+
+// Creates transactions that always (asynchronously) return |err|.
+// |err| must not be OK.

[mmenke, 2014/01/28 17:27:23]

Think it's generally a bad idea to mention function arguments in class
description (And it's no longer "err", for that matter).  Suggest something
like:  "Creates transactions that always (asynchronously) return a specified
error.  The error is returned asynchronously, just after the transaction is
started."

[Randy Smith (Not in Mondays), 2014/01/28 22:52:59]

SGTM.  Done.

+class NET_EXPORT FailingHttpTransactionFactory : public HttpTransactionFactory {
+ public:
+  // The caller must guarantee that |session| outlives this object.
+  FailingHttpTransactionFactory(HttpNetworkSession* session, Error error);
+  virtual ~FailingHttpTransactionFactory();
+
+  // HttpTransactionFactory:
+  virtual int CreateTransaction(
+      RequestPriority priority,
+      scoped_ptr<HttpTransaction>* trans) OVERRIDE;
+  virtual HttpCache* GetCache() OVERRIDE;
+  virtual HttpNetworkSession* GetSession() OVERRIDE;

[mmenke, 2014/01/28 17:27:23]

include platform_specific for OVERRIDE.

[Randy Smith (Not in Mondays), 2014/01/28 22:52:59]

I think you meant compiler_specific.h, so I included that.  Done.

[mmenke, 2014/01/28 23:10:22]

Gah...compiler_specific was named platform_specific 2 or 3 years ago.  You think
I'd have gotten used to the new name by now.

+
+ private:
+  HttpNetworkSession* session_;
+  Error error_;
+};
+
+}  // namespace net
+
+#endif  // NET_FAILING_HTTP_TRANSACTION_FACTORY_H_