Update to Chromium version 97.0.4692.0 (#938553)

- Remove CefRequestContextHandler::OnBeforePluginLoad and
  CefRequestContext::PurgePluginListCache (fixes issue #3047). These methods
  stopped being relevant after the removal of Flash support in January 2021.
  The last remaining PPAPI plugin (PDF viewer) will switch to a non-plugin
  implementation in the near future (see https://crbug.com/702993#c58) and
  functionality related to plugin filtering has already been removed in
  https://crrev.com/343ae351c9.

libcef_dll/cpptoc/request_context_cpptoc.cc

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=38ae668703b71d27d2bcd7cd9230817edd5b8f41$
+// $hash=2c880c966ce6c72b764d41e2bf25d34a50f98fea$
 //
 
 #include "libcef_dll/cpptoc/request_context_cpptoc.h"
@@ -233,20 +233,6 @@ int CEF_CALLBACK request_context_clear_scheme_handler_factories(
   return _retval;
 }
 
-void CEF_CALLBACK
-request_context_purge_plugin_list_cache(struct _cef_request_context_t* self,
-                                        int reload_pages) {
-  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
-
-  DCHECK(self);
-  if (!self)
-    return;
-
-  // Execute
-  CefRequestContextCppToC::Get(self)->PurgePluginListCache(
-      reload_pages ? true : false);
-}
-
 int CEF_CALLBACK
 request_context_has_preference(struct _cef_request_context_t* self,
                                const cef_string_t* name) {
@@ -575,8 +561,6 @@ CefRequestContextCppToC::CefRequestContextCppToC() {
       request_context_register_scheme_handler_factory;
   GetStruct()->clear_scheme_handler_factories =
       request_context_clear_scheme_handler_factories;
-  GetStruct()->purge_plugin_list_cache =
-      request_context_purge_plugin_list_cache;
   GetStruct()->has_preference = request_context_has_preference;
   GetStruct()->get_preference = request_context_get_preference;
   GetStruct()->get_all_preferences = request_context_get_all_preferences;