Allow loading of unpacked extensions with manifest_version 1.

chrome/common/extensions/extension.cc

 // 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.
 
 #include "chrome/common/extensions/extension.h"
 
 #include <algorithm>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
@@ skipping 39 matching lines @@
 
 namespace keys = extension_manifest_keys;
 namespace values = extension_manifest_values;
 namespace errors = extension_manifest_errors;
 
 using extensions::csp_validator::ContentSecurityPolicyIsLegal;
 using extensions::csp_validator::ContentSecurityPolicyIsSecure;
 
 namespace {
 
-const int kModernManifestVersion = 2;
+const int kModernManifestVersion = 1;
 const int kPEMOutputColumns = 65;
 
 // KEY MARKERS
 const char kKeyBeginHeaderMarker[] = "-----BEGIN";
 const char kKeyBeginFooterMarker[] = "-----END";
 const char kKeyInfoEndMarker[] = "KEY-----";
 const char kPublic[] = "PUBLIC";
 const char kPrivate[] = "PRIVATE";
 
 const int kRSAKeySize = 1024;
@@ skipping 2911 matching lines @@
     already_disabled(false),
     extension(extension) {}
 
 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
     const Extension* extension,
     const ExtensionPermissionSet* permissions,
     Reason reason)
     : reason(reason),
       extension(extension),
       permissions(permissions) {}