Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 0fee68b7c1e9c9e33e3d884a9da82c28cf688834..93ee61d9664241c5d7db34c7f58c36d30c3a2941 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -558,6 +558,7 @@ class Browser : public TabStripModelObserver,
                       bool user_gesture,
                       bool* was_blocked) override;
   void ActivateContents(content::WebContents* contents) override;
+  void ActivateContentsForUserGesture(content::WebContents* contents) override;
   void DeactivateContents(content::WebContents* contents) override;
   void LoadingStateChanged(content::WebContents* source,
                            bool to_different_document) override;