Move the core download files to content.

content/browser/download/download_request_handle.h

Index: content/browser/download/download_request_handle.h
===================================================================
--- content/browser/download/download_request_handle.h	(revision 96793)
+++ content/browser/download/download_request_handle.h	(working copy)
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
-#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
+#ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
+#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
 #pragma once
 
 #include <string>
@@ -60,4 +60,4 @@
   int request_id_;
 };
 
-#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
+#endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_