Add IPC benchmarking API to Blink TestRunner

content/shell/renderer/ipc_echo.cc

Index: content/shell/renderer/ipc_echo.cc
diff --git a/content/shell/renderer/ipc_echo.cc b/content/shell/renderer/ipc_echo.cc
new file mode 100644
index 0000000000000000000000000000000000000000..52ef6c2aaf369690c400e42b786b9b86f15dac5b
--- /dev/null
+++ b/content/shell/renderer/ipc_echo.cc
@@ -0,0 +1,39 @@
+// 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 "content/shell/renderer/ipc_echo.h"
+
+#include "base/logging.h"
+#include "content/shell/common/shell_messages.h"
+#include "ipc/ipc_sender.h"
+#include "third_party/WebKit/public/web/WebDOMCustomEvent.h"
+#include "third_party/WebKit/public/web/WebDOMEvent.h"
+#include "third_party/WebKit/public/web/WebSerializedScriptValue.h"
+
+namespace content {
+
+IPCEcho::IPCEcho(blink::WebDocument document,
+                                     IPC::Sender* sender,
+                                     int routing_id)
+    : document_(document), sender_(sender), routing_id_(routing_id),
+      last_echo_id_(0) {
+}
+
+void IPCEcho::RequestEcho(int id, int size) {
+  sender_->Send(new ShellViewHostMsg_EchoPing(
+      routing_id_, id, std::string(size, '*')));
+}
+
+void IPCEcho::DidRespondEcho(int id, int size) {
+  last_echo_id_ = id;
+  last_echo_size_ = size;
+  blink::WebString eventName = blink::WebString::fromUTF8("CustomEvent");
+  blink::WebString eventType = blink::WebString::fromUTF8("pong");
+  blink::WebDOMEvent event = document_.createEvent(eventName);
+  event.to<blink::WebDOMCustomEvent>().initCustomEvent(
+      eventType, false, false, blink::WebSerializedScriptValue());
+  document_.dispatchEvent(event);
+}
+
+}  // namespace content