Update to Chromium version 72.0.3615.0 (#609159)

- The |category| value for all TRACE calls from CEF client applications is now
  "cef.client" due to https://crrev.com/331266377d.
- The |with_menu_marker| parameter to CreateMenuButton has been removed due to
  https://crrev.com/7f7e382118.

libcef/browser/browser_context.cc

@@ -105,10 +105,6 @@ void CefBrowserContext::Shutdown() {
   }
 }
 
-base::FilePath CefBrowserContext::GetCachePath() const {
-  return GetPath();
-}
-
 content::ResourceContext* CefBrowserContext::GetResourceContext() {
   return resource_context_.get();
 }