Remove extension.h #include from profile.h.

chrome/common/extensions/extension_constants.h

 // Copyright (c) 2011 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 CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #pragma once
 
 #include "base/basictypes.h"
 
@@ skipping 392 matching lines @@
   // What causes an extension to be installed? Used in histograms, so don't
   // change existing values.
   enum CrxInstallCause {
     INSTALL_CAUSE_UNSET = 0,
     INSTALL_CAUSE_USER_DOWNLOAD,
     INSTALL_CAUSE_UPDATE,
     INSTALL_CAUSE_EXTERNAL_FILE,
     INSTALL_CAUSE_AUTOMATION,
     NUM_INSTALL_CAUSES
   };
+
+  enum UnloadedExtensionReason {
+    UNLOAD_REASON_DISABLE,    // Extension is being disabled.
+    UNLOAD_REASON_UPDATE,     // Extension is being updated to a newer version.
+    UNLOAD_REASON_UNINSTALL,  // Extension is being uninstalled.
+  };
 }  // extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_