Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

content/public/browser/web_contents_delegate.cc

Index: content/public/browser/web_contents_delegate.cc
diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index 808ab9fede045427113479d9d72d8db5e957c7ae..4dcc389e017a31ad2f00345d93964b19e41e9374 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -23,6 +23,11 @@ WebContents* WebContentsDelegate::OpenURLFromTab(WebContents* source,
   return nullptr;
 }
 
+void WebContentsDelegate::ActivateContentsForUserGesture(
+    WebContents* contents) {
+  ActivateContents(contents);
+}
+
 bool WebContentsDelegate::IsPopupOrPanel(const WebContents* source) const {
   return false;
 }