Add canUpdateLayout & canHandleGestureEvent to WebViewClient.

components/plugins/renderer/webview_plugin.cc

Index: components/plugins/renderer/webview_plugin.cc
diff --git a/components/plugins/renderer/webview_plugin.cc b/components/plugins/renderer/webview_plugin.cc
index 075515a0779ff784b51c27f377e22cf38aba4a59..086bf176bfa4bbac7c2a32fc999c866408cd6910 100644
--- a/components/plugins/renderer/webview_plugin.cc
+++ b/components/plugins/renderer/webview_plugin.cc
@@ -267,6 +267,14 @@ WebViewPlugin::WebViewHelper::~WebViewHelper() {
 
 bool WebViewPlugin::WebViewHelper::acceptsLoadDrops() { return false; }
 
+bool WebViewPlugin::WebViewHelper::canHandleGestureEvent() {
+  return true;
+}
+
+bool WebViewPlugin::WebViewHelper::canUpdateLayout() {
+  return true;
+}
+
 void WebViewPlugin::WebViewHelper::setToolTipText(
     const WebString& text,
     blink::WebTextDirection hint) {