[wasm] memory size is an uint32_t, not a size_t.

src/compiler/wasm-compiler.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/compiler/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
@@ skipping 2560 matching lines @@
   Node* node = graph()->NewNode(op, addr, jsgraph()->Int32Constant(0), val,
                                 *effect_, *control_);
   *effect_ = node;
   return node;
 }
 
 void WasmGraphBuilder::BoundsCheckMem(MachineType memtype, Node* index,
                                       uint32_t offset,
                                       wasm::WasmCodePosition position) {
   DCHECK(module_ && module_->instance);
-  size_t size = module_->instance->mem_size;
+  uint32_t size = module_->instance->mem_size;
   byte memsize = wasm::WasmOpcodes::MemSize(memtype);
 
   // Check against the effective size.
   size_t effective_size;
   if (offset >= size || (static_cast<uint64_t>(offset) + memsize) > size) {
     effective_size = 0;
   } else {
     effective_size = size - offset - memsize + 1;
   }
   CHECK(effective_size <= kMaxUInt32);
@@ skipping 695 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8