deps: V8: cherry-pick c8785d1

Original commit message:

    [heap, api] Advance deprecations around global handles

    Bug: chromium:923361, v8:8834
    Change-Id: I46b6ad9eaa86476963a4e2cb3a5712447f180c20
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1528235
    Auto-Submit: Michael Lippautz <[email protected]>
    Commit-Queue: Ulan Degenbaev <[email protected]>
    Reviewed-by: Ulan Degenbaev <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#60303}

Refs: v8/v8@c8785d1

Author: targos

common.gypi

@@ -37,7 +37,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.14',
+    'v8_embedder_string': '-node.15',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/include/v8-util.h

@@ -198,7 +198,7 @@ class PersistentValueMapBase {
    * Call V8::RegisterExternallyReferencedObject with the map value for given
    * key.
    */
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "Used TracedGlobal and EmbedderHeapTracer::RegisterEmbedderReference",
       inline void RegisterExternallyReferencedObject(K& key));
 

deps/v8/include/v8.h

@@ -549,7 +549,7 @@ template <class T> class PersistentBase {
    * is alive. Only allowed when the embedder is asked to trace its heap by
    * EmbedderHeapTracer.
    */
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "Used TracedGlobal and EmbedderHeapTracer::RegisterEmbedderReference",
       V8_INLINE void RegisterExternalReference(Isolate* isolate) const);
 
@@ -572,7 +572,7 @@ template <class T> class PersistentBase {
    *
    * This bit is cleared after the each garbage collection pass.
    */
-  V8_DEPRECATE_SOON("Use TracedGlobal.", V8_INLINE void MarkActive());
+  V8_DEPRECATED("Use TracedGlobal.", V8_INLINE void MarkActive());
 
   V8_DEPRECATED("See MarkIndependent.", V8_INLINE bool IsIndependent() const);