Update to Chromium version 82.0.4085.0 (#749737)

- Building on macOS now requires the 10.15 SDK. Xcode 11.3 is recommended as
  Xcode 11.4 is not currently supported (see https://crbug.com/1065146).
- Jumbo build configuration is no longer supported.

Chromium is skipping the M82 release and consequently no CEF 4085 branch will
be created. For details on the Chromium decision see
https://groups.google.com/a/chromium.org/d/msg/chromium-dev/Vn7uzglqLz0/JItlSrZxBAAJ

libcef/browser/extensions/extensions_browser_client.h

@@ -55,7 +55,7 @@ class CefExtensionsBrowserClient : public ExtensionsBrowserClient {
       mojo::PendingRemote<network::mojom::URLLoaderClient> client,
       bool send_cors_header) override;
   bool AllowCrossRendererResourceLoad(const GURL& url,
-                                      content::ResourceType resource_type,
+                                      blink::mojom::ResourceType resource_type,
                                       ui::PageTransition page_transition,
                                       int child_id,
                                       bool is_incognito,