Update to Chromium version 74.0.3729.0 (#638880)

- Windows: 10.0.17763.0 SDK is now required.
- Mac: 10.13 SDK is now required.
- Removed CefRequestContext::ResolveHostCached which is no longer supported by Chromium.

libcef/browser/net/net_util.h

@@ -16,6 +16,6 @@ namespace net_util {
 // the CEF API.
 bool IsInternalRequest(const net::URLRequest* request);
 
-};  // namespace net_util
+}  // namespace net_util
 
 #endif  // CEF_LIBCEF_BROWSER_NET_NET_UTIL_H_