[wasm] Change the constant kV8MaxWasmMemoryPages to a command line flag.

src/wasm/wasm-interpreter.cc

Index: src/wasm/wasm-interpreter.cc
diff --git a/src/wasm/wasm-interpreter.cc b/src/wasm/wasm-interpreter.cc
index aa0884c50c2644c9f9d2d57e147eea0019cd6d2b..a0d687b64991606bf339dccf3c4a7ec15d922cb0 100644
--- a/src/wasm/wasm-interpreter.cc
+++ b/src/wasm/wasm-interpreter.cc
@@ -664,7 +664,7 @@ static inline int32_t ExecuteGrowMemory(uint32_t delta_pages,
                                         WasmInstance* instance) {
   // TODO(ahaas): Move memory allocation to wasm-module.cc for better
   // encapsulation.
-  if (delta_pages > wasm::kV8MaxWasmMemoryPages ||
+  if (delta_pages > static_cast<uint32_t>(FLAG_wasm_max_mem_pages) ||
       delta_pages > instance->module->max_mem_pages) {
     return -1;
   }
@@ -681,7 +681,8 @@ static inline int32_t ExecuteGrowMemory(uint32_t delta_pages,
   } else {
     DCHECK_NOT_NULL(instance->mem_start);
     new_size = old_size + delta_pages * wasm::WasmModule::kPageSize;
-    if (new_size / wasm::WasmModule::kPageSize > wasm::kV8MaxWasmMemoryPages ||
+    if (new_size / wasm::WasmModule::kPageSize >
+            static_cast<uint32_t>(FLAG_wasm_max_mem_pages) ||
         new_size / wasm::WasmModule::kPageSize >
             instance->module->max_mem_pages) {
       return -1;