[wasm] Enforce limits for maximums for many WebAssembly binary entities.

src/wasm/wasm-module.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include <memory>
 
 #include "src/api.h"
@@ skipping 44 matching lines @@
   kNameSectionCode = 12,     // Name section (encoded as a string)
 };
 
 inline bool IsValidSectionCode(uint8_t byte) {
   return kTypeSectionCode <= byte && byte <= kDataSectionCode;
 }
 
 const char* SectionName(WasmSectionCode code);
 
 // Constants for fixed-size elements within a module.
-static const uint32_t kMaxReturnCount = 1;
 static const uint8_t kResizableMaximumFlag = 1;
 static const int32_t kInvalidFunctionIndex = -1;
 
 enum WasmExternalKind {
   kExternalFunction = 0,
   kExternalTable = 1,
   kExternalMemory = 2,
   kExternalGlobal = 3
 };
 
@@ skipping 372 matching lines @@
 void ValidateModuleState(Isolate* isolate, Handle<WasmModuleObject> module_obj);
 void ValidateOrphanedInstance(Isolate* isolate,
                               Handle<WasmInstanceObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_