[offthread] Remove Isolate param from SanityCheck

The Isolate* parameter in the deserializer SanityCheck is unused, and is
blocking the use of the deserializer off-thread.

Bug: chromium:1075999
Change-Id: I0f2acae3c1aff62aafeb2680a2eecb44b1608803
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2184290
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67594}

src/snapshot/code-serializer.cc

@@ -270,8 +270,7 @@ MaybeHandle<SharedFunctionInfo> CodeSerializer::Deserialize(
   SerializedCodeData::SanityCheckResult sanity_check_result =
       SerializedCodeData::CHECK_SUCCESS;
   const SerializedCodeData scd = SerializedCodeData::FromCachedData(
-      isolate, cached_data,
-      SerializedCodeData::SourceHash(source, origin_options),
+      cached_data, SerializedCodeData::SourceHash(source, origin_options),
       &sanity_check_result);
   if (sanity_check_result != SerializedCodeData::CHECK_SUCCESS) {
     if (FLAG_profile_deserialization) PrintF("[Cached code failed check]\n");
@@ -405,7 +404,7 @@ SerializedCodeData::SerializedCodeData(const std::vector<byte>* payload,
 }
 
 SerializedCodeData::SanityCheckResult SerializedCodeData::SanityCheck(
-    Isolate* isolate, uint32_t expected_source_hash) const {
+    uint32_t expected_source_hash) const {
   if (this->size_ < kHeaderSize) return INVALID_HEADER;
   uint32_t magic_number = GetMagicNumber();
   if (magic_number != kMagicNumber) return MAGIC_NUMBER_MISMATCH;
@@ -471,11 +470,11 @@ SerializedCodeData::SerializedCodeData(ScriptData* data)
     : SerializedData(const_cast<byte*>(data->data()), data->length()) {}
 
 SerializedCodeData SerializedCodeData::FromCachedData(
-    Isolate* isolate, ScriptData* cached_data, uint32_t expected_source_hash,
+    ScriptData* cached_data, uint32_t expected_source_hash,
     SanityCheckResult* rejection_result) {
   DisallowHeapAllocation no_gc;
   SerializedCodeData scd(cached_data);
-  *rejection_result = scd.SanityCheck(isolate, expected_source_hash);
+  *rejection_result = scd.SanityCheck(expected_source_hash);
   if (*rejection_result != CHECK_SUCCESS) {
     cached_data->Reject();
     return SerializedCodeData(nullptr, 0);

src/snapshot/code-serializer.h

@@ -109,8 +109,7 @@ class SerializedCodeData : public SerializedData {
   static const uint32_t kHeaderSize = POINTER_SIZE_ALIGN(kUnalignedHeaderSize);
 
   // Used when consuming.
-  static SerializedCodeData FromCachedData(Isolate* isolate,
-                                           ScriptData* cached_data,
+  static SerializedCodeData FromCachedData(ScriptData* cached_data,
                                            uint32_t expected_source_hash,
                                            SanityCheckResult* rejection_result);
 
@@ -136,8 +135,7 @@ class SerializedCodeData : public SerializedData {
     return Vector<const byte>(data_ + kHeaderSize, size_ - kHeaderSize);
   }
 
-  SanityCheckResult SanityCheck(Isolate* isolate,
-                                uint32_t expected_source_hash) const;
+  SanityCheckResult SanityCheck(uint32_t expected_source_hash) const;
 };
 
 }  // namespace internal