[wasm] Remove some dead and obsolete fields.

R=ahaas@chromium.org

Change-Id: I8db129e18dff445a3650a0d5c14da835aaa262d9
Reviewed-on: https://chromium-review.googlesource.com/1033742
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52889}

src/objects-debug.cc

@@ -1516,7 +1516,6 @@ void WasmCompiledModule::WasmCompiledModuleVerify() {
   VerifyObjectField(kOwningInstanceOffset);
   VerifyObjectField(kWasmModuleOffset);
   VerifyObjectField(kNativeModuleOffset);
-  VerifyObjectField(kLazyCompileDataOffset);
 }
 
 void WasmDebugInfo::WasmDebugInfoVerify() {

src/wasm/module-compiler.h

@@ -152,7 +152,6 @@ class AsyncCompileJob {
   std::unique_ptr<WasmModule> module_;
 
   std::vector<DeferredHandles*> deferred_handles_;
-  Handle<WasmModuleObject> module_object_;
   Handle<WasmCompiledModule> compiled_module_;
 
   std::unique_ptr<CompileStep> step_;

src/wasm/wasm-objects.cc

@@ -731,10 +731,6 @@ void WasmInstanceObject::SetRawMemory(byte* mem_start, uint32_t mem_size) {
   set_memory_mask(mem_mask64);
 }
 
-WasmModuleObject* WasmInstanceObject::module_object() {
-  return compiled_module()->wasm_module();
-}
-
 WasmModule* WasmInstanceObject::module() {
   return compiled_module()->shared()->module();
 }

src/wasm/wasm-objects.h

@@ -314,7 +314,6 @@ class WasmInstanceObject : public JSObject {
                                 WASM_INSTANCE_OBJECT_FIELDS)
 #undef WASM_INSTANCE_OBJECT_FIELDS
 
-  WasmModuleObject* module_object();
   V8_EXPORT_PRIVATE wasm::WasmModule* module();
 
   static bool EnsureIndirectFunctionTableWithMinimumSize(
@@ -500,7 +499,6 @@ class WasmCompiledModule : public Struct {
   V(kOwningInstanceOffset, kPointerSize)        \
   V(kWasmModuleOffset, kPointerSize)            \
   V(kNativeModuleOffset, kPointerSize)          \
-  V(kLazyCompileDataOffset, kPointerSize)       \
   V(kSize, 0)
 
   DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize,