[wasm] Remove unused field from WasmCompiledModule

R=ahaas@chromium.org

Bug: 
Change-Id: I3817745013828d455ca1b623724d8789cc5f01ce
Reviewed-on: https://chromium-review.googlesource.com/860643Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50510}

src/wasm/wasm-objects.cc

@@ -1255,7 +1255,6 @@ Handle<WasmCompiledModule> WasmCompiledModule::New(
     // reliable, and we need these at Reset (which is called at
     // finalization). If the order were reliable, and top-down, we could instead
     // just get them from shared().
-    compiled_module->set_initial_pages(module->initial_pages);
     compiled_module->set_num_imported_functions(module->num_imported_functions);
 
     int num_function_tables = static_cast<int>(function_tables.size());
@@ -1715,10 +1714,6 @@ void WasmCompiledModule::ReinitializeAfterDeserialization(
   DCHECK(WasmSharedModuleData::IsWasmSharedModuleData(*shared));
 }
 
-uint32_t WasmCompiledModule::default_mem_size() const {
-  return initial_pages() * wasm::kWasmPageSize;
-}
-
 MaybeHandle<String> WasmSharedModuleData::GetModuleNameOrNull(
     Isolate* isolate, Handle<WasmSharedModuleData> shared) {
   WasmModule* module = shared->module();

src/wasm/wasm-objects.h

@@ -483,8 +483,7 @@ class WasmCompiledModule : public FixedArray {
   MACRO(OBJECT, FixedArray, function_tables)                  \
   MACRO(OBJECT, FixedArray, signature_tables)                 \
   MACRO(CONST_OBJECT, FixedArray, empty_function_tables)      \
-  MACRO(CONST_OBJECT, FixedArray, empty_signature_tables)     \
-  MACRO(SMALL_CONST_NUMBER, uint32_t, initial_pages)
+  MACRO(CONST_OBJECT, FixedArray, empty_signature_tables)
 
 // TODO(mtrofin): this is unnecessary when we stop needing
 // FLAG_wasm_jit_to_native, because we have instance_id on NativeModule.
@@ -524,8 +523,6 @@ class WasmCompiledModule : public FixedArray {
   // TODO(mtrofin): delete this when we don't need FLAG_wasm_jit_to_native
   static void ResetGCModel(Isolate* isolate, WasmCompiledModule* module);
 
-  uint32_t default_mem_size() const;
-
   wasm::NativeModule* GetNativeModule() const;
   void InsertInChain(WasmModuleObject*);
   void RemoveFromChain();