Move history extension API implementation to history dir.

chrome/browser/extensions/extension_history_api_constants.h

Index: chrome/browser/extensions/extension_history_api_constants.h
diff --git a/chrome/browser/extensions/extension_history_api_constants.h b/chrome/browser/extensions/extension_history_api_constants.h
deleted file mode 100644
index 74ac8594f8576bcb41f3b80dc9705a0b1495eb77..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/extension_history_api_constants.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright (c) 2009 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 for the History API.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_HISTORY_API_CONSTANTS_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_HISTORY_API_CONSTANTS_H_
-#pragma once
-
-namespace extension_history_api_constants {
-
-// Keys.
-extern const char kAllHistoryKey[];
-extern const char kEndTimeKey[];
-extern const char kFaviconUrlKey[];
-extern const char kIdKey[];
-extern const char kLastVisitdKey[];
-extern const char kMaxResultsKey[];
-extern const char kNewKey[];
-extern const char kReferringVisitId[];
-extern const char kRemovedKey[];
-extern const char kStartTimeKey[];
-extern const char kTextKey[];
-extern const char kTitleKey[];
-extern const char kTypedCountKey[];
-extern const char kVisitCountKey[];
-extern const char kTransition[];
-extern const char kUrlKey[];
-extern const char kUrlsKey[];
-extern const char kVisitId[];
-extern const char kVisitTime[];
-
-// Events.
-extern const char kOnVisited[];
-extern const char kOnVisitRemoved[];
-
-// Errors.
-extern const char kInvalidIdError[];
-extern const char kInvalidUrlError[];
-
-};  // namespace extension_history_api_constants
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HISTORY_API_CONSTANTS_H_