Remove extension automation support that was used only by CEEE.

chrome/browser/automation/extension_automation_constants.h

Index: chrome/browser/automation/extension_automation_constants.h
diff --git a/chrome/browser/automation/extension_automation_constants.h b/chrome/browser/automation/extension_automation_constants.h
deleted file mode 100644
index dea4d2d033d0cf74b1bec448eb090e9357612861..0000000000000000000000000000000000000000
--- a/chrome/browser/automation/extension_automation_constants.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (c) 2010 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.
-
-// Constants used to encode requests and responses for automation.
-
-#ifndef CHROME_BROWSER_AUTOMATION_EXTENSION_AUTOMATION_CONSTANTS_H_
-#define CHROME_BROWSER_AUTOMATION_EXTENSION_AUTOMATION_CONSTANTS_H_
-#pragma once
-
-namespace extension_automation_constants {
-
-// All extension automation related messages will have this origin.
-extern const char kAutomationOrigin[];
-// Key used for all extension automation request types.
-extern const char kAutomationRequestIdKey[];
-
-// Keys used for API communications
-extern const char kAutomationHasCallbackKey[];
-extern const char kAutomationErrorKey[];  // not present implies success
-extern const char kAutomationNameKey[];
-extern const char kAutomationArgsKey[];
-extern const char kAutomationResponseKey[];
-// All external API requests have this target.
-extern const char kAutomationRequestTarget[];
-// All API responses should have this target.
-extern const char kAutomationResponseTarget[];
-
-// Keys used for port communications
-extern const char kAutomationConnectionIdKey[];
-extern const char kAutomationMessageDataKey[];
-extern const char kAutomationExtensionIdKey[];
-extern const char kAutomationPortIdKey[];
-extern const char kAutomationChannelNameKey[];
-extern const char kAutomationTabJsonKey[];
-
-// All external port message requests should have this target.
-extern const char kAutomationPortRequestTarget[];
-// All external port message responses have this target.
-extern const char kAutomationPortResponseTarget[];
-
-// All external browser events have this target.
-extern const char kAutomationBrowserEventRequestTarget[];
-
-// The command codes for our private port protocol.
-enum PrivatePortCommand {
-  OPEN_CHANNEL = 0,
-  CHANNEL_OPENED = 1,
-  POST_MESSAGE = 2,
-  CHANNEL_CLOSED = 3,
-};
-
-};  // namespace automation_extension_constants
-
-#endif  // CHROME_BROWSER_AUTOMATION_EXTENSION_AUTOMATION_CONSTANTS_H_