Move user_agent code from webkit/ to content/.

webkit/common/user_agent/webkit_user_agent_export.h

Index: webkit/common/user_agent/webkit_user_agent_export.h
diff --git a/webkit/common/user_agent/webkit_user_agent_export.h b/webkit/common/user_agent/webkit_user_agent_export.h
deleted file mode 100644
index 5f9598ff2bc10ed16f179ea7b1271f7ba949b82d..0000000000000000000000000000000000000000
--- a/webkit/common/user_agent/webkit_user_agent_export.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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.
-
-#ifndef WEBKIT_COMMON_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_
-#define WEBKIT_COMMON_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_
-
-#if defined(COMPONENT_BUILD)
-#if defined(WIN32)
-
-#if defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
-#define WEBKIT_USER_AGENT_EXPORT __declspec(dllexport)
-#else
-#define WEBKIT_USER_AGENT_EXPORT __declspec(dllimport)
-#endif  // defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
-
-#else // defined(WIN32)
-#if defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
-#define WEBKIT_USER_AGENT_EXPORT __attribute__((visibility("default")))
-#else
-#define WEBKIT_USER_AGENT_EXPORT
-#endif
-#endif
-
-#else // defined(COMPONENT_BUILD)
-#define WEBKIT_USER_AGENT_EXPORT
-#endif
-
-#endif  // WEBKIT_COMMON_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_