const char kAttributeSrc[] = "src";
// Parameters/properties on events.
-const char kDefaultPromptText[] = "defaultPromptText";
const char kId[] = "id";
const char kInitialHeight[] = "initialHeight";
const char kInitialWidth[] = "initialWidth";
const char kLastUnlockedBySelf[] = "lastUnlockedBySelf";
-const char kMessageText[] = "messageText";
-const char kMessageType[] = "messageType";
const char kName[] = "name";
const char kPermission[] = "permission";
const char kPermissionTypeDialog[] = "dialog";
const char kURL[] = "url";
const char kWindowID[] = "windowId";
const char kWindowOpenDisposition[] = "windowOpenDisposition";
-const char kUserGesture[] = "userGesture";
// Error messages.
const char kErrorAlreadyNavigated[] =