src: remove usages of GetBackingStore in modules

This removes all usages of GetBackingStore in modules. See the linked
issue for an explanation.

Refs: #32226
Refs: #43921
PR-URL: #44076
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Feng Yu <F3n67u@outlook.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

src/module_wrap.cc

@@ -178,8 +178,8 @@ void ModuleWrap::New(const FunctionCallbackInfo<Value>& args) {
       if (!args[5]->IsUndefined()) {
         CHECK(args[5]->IsArrayBufferView());
         Local<ArrayBufferView> cached_data_buf = args[5].As<ArrayBufferView>();
-        uint8_t* data = static_cast<uint8_t*>(
-            cached_data_buf->Buffer()->GetBackingStore()->Data());
+        uint8_t* data =
+            static_cast<uint8_t*>(cached_data_buf->Buffer()->Data());
         cached_data =
             new ScriptCompiler::CachedData(data + cached_data_buf->ByteOffset(),
                                            cached_data_buf->ByteLength());

src/node_contextify.cc

@@ -746,8 +746,7 @@ void ContextifyScript::New(const FunctionCallbackInfo<Value>& args) {
 
   ScriptCompiler::CachedData* cached_data = nullptr;
   if (!cached_data_buf.IsEmpty()) {
-    uint8_t* data = static_cast<uint8_t*>(
-        cached_data_buf->Buffer()->GetBackingStore()->Data());
+    uint8_t* data = static_cast<uint8_t*>(cached_data_buf->Buffer()->Data());
     cached_data = new ScriptCompiler::CachedData(
         data + cached_data_buf->ByteOffset(), cached_data_buf->ByteLength());
   }
@@ -1068,8 +1067,7 @@ void ContextifyContext::CompileFunction(
   // Read cache from cached data buffer
   ScriptCompiler::CachedData* cached_data = nullptr;
   if (!cached_data_buf.IsEmpty()) {
-    uint8_t* data = static_cast<uint8_t*>(
-        cached_data_buf->Buffer()->GetBackingStore()->Data());
+    uint8_t* data = static_cast<uint8_t*>(cached_data_buf->Buffer()->Data());
     cached_data = new ScriptCompiler::CachedData(
       data + cached_data_buf->ByteOffset(), cached_data_buf->ByteLength());
   }