Add a force pipelining option to load flags.

net/http/http_pipelined_host_forced.cc

Index: net/http/http_pipelined_host_forced.cc
diff --git a/net/http/http_pipelined_host_forced.cc b/net/http/http_pipelined_host_forced.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fbd304bee05767fde755586a9ecf7ce6bc3d254f
--- /dev/null
+++ b/net/http/http_pipelined_host_forced.cc
@@ -0,0 +1,108 @@
+// 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.
+
+#include "net/http/http_pipelined_host_forced.h"
+
+#include "base/values.h"
+#include "net/http/http_pipelined_connection_impl.h"
+#include "net/http/http_pipelined_stream.h"
+#include "net/socket/buffered_write_stream_socket.h"
+#include "net/socket/client_socket_handle.h"
+
+using base::DictionaryValue;
+using base::ListValue;
+using base::Value;

[mmenke, 2012/02/23 18:54:58]

These aren't needed - they're already in base/values.h.  Same goes for
pipelined_host_impl, actually.

[James Simonsen, 2012/02/23 23:49:46]

values.h says not to rely on that in new code.

+
+namespace net {
+
+HttpPipelinedHostForced::HttpPipelinedHostForced(
+    HttpPipelinedHost::Delegate* delegate,
+    const Key& key,
+    HttpPipelinedConnection::Factory* factory)
+    : delegate_(delegate),
+      key_(key),
+      factory_(factory) {

[mmenke, 2012/02/23 18:54:58]

Think you should DCHECK for unexpected key.force_pipelining() values here and in
host_pipelined_force_impl.cc.

[James Simonsen, 2012/02/23 23:49:46]

Done.

+  if (!factory) {
+    factory_.reset(new HttpPipelinedConnectionImpl::Factory());
+  }
+}
+
+HttpPipelinedHostForced::~HttpPipelinedHostForced() {
+  CHECK(!pipeline_.get());
+}
+
+HttpPipelinedStream* HttpPipelinedHostForced::CreateStreamOnNewPipeline(
+    ClientSocketHandle* connection,
+    const SSLConfig& used_ssl_config,
+    const ProxyInfo& used_proxy_info,
+    const BoundNetLog& net_log,
+    bool was_npn_negotiated,
+    SSLClientSocket::NextProto protocol_negotiated) {
+  CHECK(!pipeline_.get());
+  StreamSocket* wrapped_socket = connection->release_socket();
+  BufferedWriteStreamSocket* buffered_socket = new BufferedWriteStreamSocket(
+      wrapped_socket);
+  connection->set_socket(buffered_socket);
+  pipeline_.reset(factory_->CreateNewPipeline(
+      connection, this, key_.origin(), used_ssl_config, used_proxy_info,
+      net_log, was_npn_negotiated, protocol_negotiated));
+  return pipeline_->CreateNewStream();
+}
+
+HttpPipelinedStream* HttpPipelinedHostForced::CreateStreamOnExistingPipeline() {
+  if (!pipeline_.get()) {
+    return NULL;
+  }
+  return pipeline_->CreateNewStream();
+}
+
+bool HttpPipelinedHostForced::IsExistingPipelineAvailable() const {
+  return pipeline_.get() != NULL;
+}
+
+const HttpPipelinedHost::Key& HttpPipelinedHostForced::key() const {
+  return key_;
+}
+
+void HttpPipelinedHostForced::OnPipelineEmpty(
+    HttpPipelinedConnection* pipeline) {
+  CHECK_EQ(pipeline_.get(), pipeline);
+  pipeline_.reset();
+  delegate_->OnHostIdle(this);
+  // WARNING: We'll probably be deleted here.
+}
+
+void HttpPipelinedHostForced::OnPipelineHasCapacity(
+    HttpPipelinedConnection* pipeline) {
+  CHECK_EQ(pipeline_.get(), pipeline);
+  delegate_->OnHostHasAdditionalCapacity(this);
+  if (!pipeline->depth()) {
+    OnPipelineEmpty(pipeline);
+    // WARNING: We might be deleted here.
+  }
+}
+
+void HttpPipelinedHostForced::OnPipelineFeedback(
+    HttpPipelinedConnection* pipeline,
+    HttpPipelinedConnection::Feedback feedback) {
+  // We don't care. We always pipeline.
+}
+
+Value* HttpPipelinedHostForced::PipelineInfoToValue() const {
+  ListValue* list_value = new ListValue();
+  if (pipeline_.get()) {
+    DictionaryValue* pipeline_dict = new DictionaryValue;
+    pipeline_dict->SetString("host", key_.origin().ToString());
+    pipeline_dict->SetBoolean("forced", key_.force_pipelining());
+    pipeline_dict->SetInteger("depth", pipeline_->depth());
+    pipeline_dict->SetInteger("capacity", 1000);
+    pipeline_dict->SetBoolean("usable", pipeline_->usable());
+    pipeline_dict->SetBoolean("active", pipeline_->active());
+    pipeline_dict->SetInteger("source_id", pipeline_->net_log().source().id);
+    list_value->Append(pipeline_dict);
+  }
+  return list_value;
+}
+
+}  // namespace net