-WebViewInternal.prototype.captureVisibleRegion_ = function(spec, callback) {
- WebView.captureVisibleRegion(this.instanceId_, spec, callback);
+WebViewInternal.prototype.setZoom = function(zoomFactor, callback) {
+ if (!this.instanceId) {
+ return;
+ }
+ WebView.setZoom(this.instanceId, zoomFactor, callback);
+};
+
+WebViewInternal.prototype.getZoom = function(callback) {
+ if (!this.instanceId) {
+ return;
+ }
+ WebView.getZoom(this.instanceId, callback);
+};
+
+/** @private */
+WebViewInternal.prototype.captureVisibleRegion = function(spec, callback) {
+ WebView.captureVisibleRegion(this.instanceId, spec, callback);