Start moving core pieces of Chrome multi-process code to src\content.

content/browser/tab_contents/navigation_entry.h

Index: content/browser/tab_contents/navigation_entry.h
===================================================================
--- content/browser/tab_contents/navigation_entry.h	(revision 0)
+++ content/browser/tab_contents/navigation_entry.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_TAB_CONTENTS_NAVIGATION_ENTRY_H_
-#define CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_ENTRY_H_
+#ifndef CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_ENTRY_H_
+#define CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_ENTRY_H_
 #pragma once
 
 #include <string>
@@ -426,4 +426,4 @@
   // Copy and assignment is explicitly allowed for this class.
 };
 
-#endif  // CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_ENTRY_H_
+#endif  // CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_ENTRY_H_