const char kEventResponsive[] = "webview.onResponsive";
const char kEventSizeChanged[] = "webview.onSizeChanged";
const char kEventUnresponsive[] = "webview.onUnresponsive";
+const char kEventZoomChange[] = "webview.onZoomChange";
// Parameters/properties on events.
const char kLevel[] = "level";
const char kReason[] = "reason";
const char kRequestId[] = "requestId";
const char kSourceId[] = "sourceId";
+const char kOldZoomFactor[] = "oldZoomFactor";
+const char kNewZoomFactor[] = "newZoomFactor";
// Internal parameters/properties on events.
const char kInternalCurrentEntryIndex[] = "currentEntryIndex";