[wasm] Use a Managed<WasmModule> to hold metadata about modules.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 792706dc71c54dc2de0bd5f992044004d26f2b46..a1ba98e8e4eb0b5f37de11bebf5e59487cfac091 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -509,7 +509,7 @@ Handle<Object> Isolate::CaptureSimpleStackTrace(Handle<JSReceiver> error_object,
 
       case StackFrame::WASM: {
         WasmFrame* wasm_frame = WasmFrame::cast(frame);
-        Handle<Object> wasm_object(wasm_frame->wasm_obj(), this);
+        Handle<Object> wasm_module(wasm_frame->wasm_obj(), this);

[Mircea Trofin, 2016/10/15 17:38:40]

Could the renames be a separate change?

         const int wasm_function_index = wasm_frame->function_index();
         Code* code = wasm_frame->unchecked_code();
         Handle<AbstractCode> abstract_code(AbstractCode::cast(code), this);
@@ -518,14 +518,14 @@ Handle<Object> Isolate::CaptureSimpleStackTrace(Handle<JSReceiver> error_object,
 
         // TODO(wasm): The wasm object returned by the WasmFrame should always
         //             be a wasm object.
-        DCHECK(wasm::IsWasmObject(*wasm_object) ||
-               wasm_object->IsUndefined(this));
+        DCHECK(wasm::IsWasmModule(*wasm_module) ||
+               wasm_module->IsUndefined(this));
 
-        int flags = wasm::WasmIsAsmJs(*wasm_object, this)
+        int flags = wasm::WasmIsAsmJs(*wasm_module, this)
                         ? FrameArray::kIsAsmJsWasmFrame
                         : FrameArray::kIsWasmFrame;
 
-        elements = FrameArray::AppendWasmFrame(elements, wasm_object,
+        elements = FrameArray::AppendWasmFrame(elements, wasm_module,
                                                wasm_function_index,
                                                abstract_code, offset, flags);
       } break;