deps: V8: cherry-pick e5dbc95

Original commit message:

    [api] Fix handle leak when getting Context embedder data

    The `Context::SlowGetAlignedPointerFromEmbedderData()` method returns
    a pointer, so the fact that it allocates handles is not obvious to
    the caller.

    Since this is the slow path anyway, simply add a handle scope inside
    of it.

    The tests are also modified to perform the same check for the
    `Object` equivalent of this method.

    Change-Id: I5f03c9a7b70b3a17315609df021606a53c9feb2d
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1879902
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#64583}

Refs: v8/v8@e5dbc95
Fixes: #30127
PR-URL: #30130
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

common.gypi

@@ -38,7 +38,7 @@
 
     # 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/src/api/api.cc

@@ -1281,6 +1281,7 @@ void Context::SetEmbedderData(int index, v8::Local<Value> value) {
 
 void* Context::SlowGetAlignedPointerFromEmbedderData(int index) {
   const char* location = "v8::Context::GetAlignedPointerFromEmbedderData()";
+  HandleScope handle_scope(GetIsolate());
   i::Handle<i::EmbedderDataArray> data =
       EmbedderDataFor(this, index, false, location);
   if (data.is_null()) return nullptr;

deps/v8/test/cctest/test-api.cc

@@ -2955,8 +2955,11 @@ THREADED_TEST(SetAlignedPointerInInternalFields) {
 
   obj->SetAlignedPointerInInternalFields(2, indices, values);
   CcTest::CollectAllGarbage();
-  CHECK_EQ(heap_allocated_1, obj->GetAlignedPointerFromInternalField(0));
-  CHECK_EQ(heap_allocated_2, obj->GetAlignedPointerFromInternalField(1));
+  {
+    v8::SealHandleScope no_handle_leak(isolate);
+    CHECK_EQ(heap_allocated_1, obj->GetAlignedPointerFromInternalField(0));
+    CHECK_EQ(heap_allocated_2, obj->GetAlignedPointerFromInternalField(1));
+  }
 
   indices[0] = 1;
   indices[1] = 0;
@@ -3009,6 +3012,7 @@ THREADED_TEST(EmbedderDataAlignedPointers) {
   }
   CcTest::CollectAllGarbage();
   for (int i = 0; i < 100; i++) {
+    v8::SealHandleScope no_handle_leak(env->GetIsolate());
     CHECK_EQ(AlignedTestPointer(i), env->GetAlignedPointerFromEmbedderData(i));
   }
 }