[wasm] Exported memory should set maximum property when maximum is defined.

src/wasm/wasm-module-builder.cc

 // 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.
 
 #include "src/signature.h"
 
 #include "src/handles.h"
 #include "src/v8.h"
 #include "src/zone/zone-containers.h"
 
@@ skipping 346 matching lines @@
     buffer.write_size(indirect_functions_.size());
     FixupSection(buffer, start);
   }
 
   // == emit memory declaration ================================================
   {
     size_t start = EmitSection(kMemorySectionCode, buffer);
     buffer.write_u8(1);  // memory count
     buffer.write_u32v(kResizableMaximumFlag);
     buffer.write_u32v(16);  // min memory size
-    buffer.write_u32v(16);  // max memory size
+    buffer.write_u32v(32);  // max memory size
     FixupSection(buffer, start);
   }
 
   // == Emit globals ===========================================================
   if (globals_.size() > 0) {
     size_t start = EmitSection(kGlobalSectionCode, buffer);
     buffer.write_size(globals_.size());
 
     for (auto global : globals_) {
       buffer.write_u8(WasmOpcodes::LocalTypeCodeFor(global.type));
@@ skipping 148 matching lines @@
   // == Emit asm.js offset table ===============================================
   buffer.write_size(functions_.size());
   // Emit the offset table per function.
   for (auto function : functions_) {
     function->WriteAsmWasmOffsetTable(buffer);
   }
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8