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/renderer/dom_document_impl.h

@@ -12,7 +12,7 @@
 namespace blink {
 class WebLocalFrame;
 class WebNode;
-};  // namespace blink
+}  // namespace blink
 
 class CefBrowserImpl;