Improving the process model extension API

chrome/browser/extensions/extension_function_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/extension_function_util.h"
+
+namespace extensions {
+
+bool ReadOneOrMoreIntegers(base::Value* value, std::vector<int>* result) {
+  if (value->IsType(Value::TYPE_INTEGER)) {
+    int v = -1;
+    if (!value->GetAsInteger(&v))
+      return false;
+    result->push_back(v);
+    return true;
+
+  } else if (value->IsType(Value::TYPE_LIST)) {
+    base::ListValue* values = static_cast<base::ListValue*>(value);
+    for (size_t i = 0; i < values->GetSize(); ++i) {
+      int v = -1;
+      if (!values->GetInteger(i, &v))
+        return false;
+      result->push_back(v);
+    }
+    return true;
+  }
+  return false;
+}
+
+} // namespace extensions