Introduces an additional extension loader that load extra extensions based on per-extension json fi…

chrome/browser/extensions/external_extension_util.cc

+// Copyright (c) 2012 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/browser/extensions/external_extension_util.h"
+
+#include "base/bind.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/json/json_file_value_serializer.h"
+#include "base/json/json_string_value_serializer.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "base/version.h"
+
+
+// Caller takes ownership of the returned dictionary.

[Sam Kerner (Chrome), 2012/04/13 22:11:02]

Now that this is in its own file, a comment explaining what it does and who uses
it would be helpful.

[Alexandre Abreu, 2012/04/13 23:24:46]

Done.

+DictionaryValue* ExternalExtensionUtil::ExtractPrefs(
+    const FilePath& path,
+    base::ValueSerializer* serializer) {
+  std::string error_msg;
+  Value* extensions = serializer->Deserialize(NULL, &error_msg);
+  if (!extensions) {
+    LOG(WARNING) << "Unable to deserialize json data: " << error_msg
+                 << " In file " << path.value() << " .";
+  } else {
+    if (!extensions->IsType(Value::TYPE_DICTIONARY)) {
+      LOG(WARNING) << "Expected a JSON dictionary in file "
+                   << path.value() << " .";
+    } else {
+      return static_cast<DictionaryValue*>(extensions);
+    }
+  }
+  return new DictionaryValue;
+}
+