Deprecate old-style allow code-gen callback

BUG=chromium:732736
R=marja@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I3b3dfdd0c55a7ec267ae26765901497611d39d29
Reviewed-on: https://chromium-review.googlesource.com/543158Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46112}

include/v8.h

@@ -7545,10 +7545,9 @@ class V8_EXPORT Isolate {
    */
   void SetAllowCodeGenerationFromStringsCallback(
       AllowCodeGenerationFromStringsCallback callback);
-  V8_DEPRECATE_SOON(
-      "Use callback with source parameter.",
-      void SetAllowCodeGenerationFromStringsCallback(
-          DeprecatedAllowCodeGenerationFromStringsCallback callback));
+  V8_DEPRECATED("Use callback with source parameter.",
+                void SetAllowCodeGenerationFromStringsCallback(
+                    DeprecatedAllowCodeGenerationFromStringsCallback callback));
 
   /**
    * Embedder over{ride|load} injection points for wasm APIs. The expectation