Revert "BUG=12114"

chrome/browser/extensions/extension_creator.h

Index: chrome/browser/extensions/extension_creator.h
diff --git a/chrome/browser/extensions/extension_creator.h b/chrome/browser/extensions/extension_creator.h
index 129e1529e301a2801557cdf6fa3552d429788544..febcecd1f76fb3861b1bb95e73d9fc544b17e3a2 100755
--- a/chrome/browser/extensions/extension_creator.h
+++ b/chrome/browser/extensions/extension_creator.h
@@ -17,6 +17,28 @@
 // generated randomly (and optionally written to |output_private_key_path|.
 class ExtensionCreator {
  public:
+  // The size of the magic character sequence at the beginning of each crx file,
+  // in bytes. This should be a multiple of 4.
+  static const size_t kExtensionHeaderMagicSize = 4;
+
+  // The magic character sequence at the beginning of each crx file.
+  static const char kExtensionHeaderMagic[];
+
+  // The current version of the crx format.
+  static const uint32 kCurrentVersion = 2;
+
+  // This header is the first data at the beginning of an extension. Its
+  // contents are purposely 32-bit aligned so that it can just be slurped into
+  // a struct without manual parsing.
+  struct ExtensionHeader {
+    char magic[kExtensionHeaderMagicSize];
+    uint32 version;
+    size_t key_size;  // The size of the public key, in bytes.
+    size_t signature_size;  // The size of the signature, in bytes.
+    // An ASN.1-encoded PublicKeyInfo structure follows.
+    // The signature follows.
+  };
+
   ExtensionCreator() {}
 
   bool Run(const FilePath& extension_dir,