Move CrxFile, FileReader, ExtensionResource to src/extensions.

extensions/common/crx_file.h

Index: extensions/common/crx_file.h
diff --git a/chrome/browser/extensions/crx_file.h b/extensions/common/crx_file.h
similarity index 94%
rename from chrome/browser/extensions/crx_file.h
rename to extensions/common/crx_file.h
index 2faa8ee9cffc31cc5ce9e780b3b8adc3e9c81bc5..cb450afb434c9258962717181075139198f7ea25 100644
--- a/chrome/browser/extensions/crx_file.h
+++ b/extensions/common/crx_file.h
@@ -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_EXTENSIONS_CRX_FILE_H_
-#define CHROME_BROWSER_EXTENSIONS_CRX_FILE_H_
+#ifndef EXTENSIONS_COMMON_CRX_FILE_H_
+#define EXTENSIONS_COMMON_CRX_FILE_H_
 
 #include <sys/types.h>
 #include "base/basictypes.h"
@@ -73,4 +73,4 @@ class CrxFile {
 
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_CRX_FILE_H_
+#endif  // EXTENSIONS_COMMON_CRX_FILE_H_