Add webdriver endpoint to send custom debugger commands

chrome/test/chromedriver/devtools_events_logger.h

Index: chrome/test/chromedriver/devtools_events_logger.h
diff --git a/chrome/test/chromedriver/devtools_events_logger.h b/chrome/test/chromedriver/devtools_events_logger.h
new file mode 100644
index 0000000000000000000000000000000000000000..b8fc2ff52ecf48bec5a0b51465632a40c5a27bae
--- /dev/null
+++ b/chrome/test/chromedriver/devtools_events_logger.h
@@ -0,0 +1,47 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.

[johnchen, 2017/04/28 21:59:32]

Please change this to 2017, and do the same for the .cc file. We don't normally
update the copyright year of existing files, but new files should carry the
current year.

[em, 2017/04/29 03:07:03]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_TEST_CHROMEDRIVER_DEVTOOLS_EVENTS_LOGGER_H_
+#define CHROME_TEST_CHROMEDRIVER_DEVTOOLS_EVENTS_LOGGER_H_
+
+#include <string>
+#include <unordered_set>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/values.h"
+#include "chrome/test/chromedriver/chrome/devtools_event_listener.h"
+#include "chrome/test/chromedriver/chrome/log.h"
+#include "chrome/test/chromedriver/chrome/status.h"
+
+// Collects DevTools events into Log messages with info level.
+//
+// The message is a JSON string of the following structure:
+// {
+//    "message": { "method": "...", "params": { ... }}  // DevTools message.
+// }
+
+class DevToolsEventsLogger : public DevToolsEventListener {
+ public:
+  // Creates a |DevToolsEventsLogger| with specific preferences.
+  DevToolsEventsLogger(Log* log, const base::ListValue* prefs);
+
+  ~DevToolsEventsLogger() override;
+
+  Status OnConnected(DevToolsClient* client) override;
+
+  Status OnEvent(DevToolsClient* client,
+                 const std::string& method,
+                 const base::DictionaryValue& params) override;
+
+ private:
+  Log* log_;  // The log where to create entries.
+
+  const base::ListValue* prefs_;
+  std::unordered_set<std::string> events_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsEventsLogger);
+};
+
+#endif  // CHROME_TEST_CHROMEDRIVER_DEVTOOLS_EVENTS_LOGGER_H_