[wasm] Accept version 0x1 binaries.

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 17 matching lines @@
 
 namespace compiler {
 class CallDescriptor;
 class WasmCompilationUnit;
 }
 
 namespace wasm {
 class ErrorThrower;
 
 const uint32_t kWasmMagic = 0x6d736100;
-const uint32_t kWasmVersion = 0x0d;
+const uint32_t kWasmVersion = 0x01;
+// Legacy version supported for short transitionary period.
+const uint32_t kWasmLegacyVersion = 0x0d;
 
 const uint8_t kWasmFunctionTypeForm = 0x60;
 const uint8_t kWasmAnyFunctionTypeForm = 0x70;
 
 enum WasmSectionCode {
   kUnknownSectionCode = 0,   // code for unknown sections
   kTypeSectionCode = 1,      // Function signature declarations
   kImportSectionCode = 2,    // Import declarations
   kFunctionSectionCode = 3,  // Function declarations
   kTableSectionCode = 4,     // Indirect function table and other tables
@@ skipping 421 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_