Update to Chromium version 68.0.3425.0 (#557062)

Known issues:
- Surface synchronization is now enabled for OSR, see issue #2447.
- Jumbo build is broken, fixed in https://crrev.com/868717ce.

libcef/browser/browser_host_impl.cc

@@ -1903,7 +1903,8 @@ bool CefBrowserHostImpl::EmbedsFullscreenWidget() const {
 
 void CefBrowserHostImpl::EnterFullscreenModeForTab(
     content::WebContents* web_contents,
-    const GURL& origin) {
+    const GURL& origin,
+    const blink::WebFullscreenOptions& options) {
   OnFullscreenModeChange(true);
 }