Update to Chromium version 122.0.6261.0 (#1250580)

Frame identifiers have changed from int64_t to string type. This is due
to https://crbug.com/1502660 which removes access to frame routing IDs
in the renderer process. New cross-process frame identifiers are 160-bit
values (32-bit child process ID + 128-bit local frame token) and most
easily represented as strings. All other frame-related expectations and
behaviors remain the same.

libcef/renderer/blink_glue.cc

@@ -56,8 +56,6 @@ blink::ExecutionContext* GetExecutionContext(v8::Local<v8::Context> context) {
 
 }  // namespace
 
-const int64_t kInvalidFrameId = -1;
-
 bool CanGoBack(blink::WebView* view) {
   if (!view) {
     return false;