Reland restrict extension features based on the extension type.

chrome/common/extensions/extension_messages.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_messages.h"
 
 #include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/extensions/manifest.h"
 #include "content/public/common/common_param_traits.h"
 
 ExtensionMsg_Loaded_Params::ExtensionMsg_Loaded_Params()
     : location(Extension::INVALID),
       creation_flags(Extension::NO_FLAGS){}
 
 ExtensionMsg_Loaded_Params::~ExtensionMsg_Loaded_Params() {}
 
 ExtensionMsg_Loaded_Params::ExtensionMsg_Loaded_Params(
     const ExtensionMsg_Loaded_Params& other)
@@ skipping 24 matching lines @@
     extension_manifest_keys::kIcons,
     extension_manifest_keys::kName,
     extension_manifest_keys::kPageAction,
     extension_manifest_keys::kPageActions,
     extension_manifest_keys::kPermissions,
     extension_manifest_keys::kPlatformApp,
     extension_manifest_keys::kPublicKey,
     extension_manifest_keys::kVersion,
   };
 
-  // Copy only the data we need.
+  // Copy only the data we need and bypass the manifest type checks.
+  DictionaryValue* source = extension->manifest()->value();
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kRendererExtensionKeys); ++i) {
     Value* temp = NULL;
-    if (extension->manifest_value()->Get(kRendererExtensionKeys[i], &temp))
+    if (source->Get(kRendererExtensionKeys[i], &temp))
       manifest->Set(kRendererExtensionKeys[i], temp->DeepCopy());
   }
 }
 
 scoped_refptr<Extension>
     ExtensionMsg_Loaded_Params::ConvertToExtension() const {
   std::string error;
 
   scoped_refptr<Extension> extension(
       Extension::Create(path, location, *manifest, creation_flags,
@@ skipping 121 matching lines @@
          ReadParam(m, iter, &p->explicit_hosts) &&
          ReadParam(m, iter, &p->scriptable_hosts);
 }
 
 void ParamTraits<ExtensionMsg_Loaded_Params>::Log(const param_type& p,
                                                   std::string* l) {
   l->append(p.id);
 }
 
 }  // namespace IPC