[modules] Turn JSModule into Module.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 544471dacdfdac863f638292ede09683b325f290..f5f999e78291df591b57fd26c2875c37ea8477b0 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -230,7 +230,7 @@ enum ContextLookupFlags {
   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
   V(UINT8X16_FUNCTION_INDEX, JSFunction, uint8x16_function)                    \
-  V(CURRENT_MODULE_INDEX, JSModule, current_module)                            \
+  V(CURRENT_MODULE_INDEX, Module, current_module)                              \
   NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                                        \
   NATIVE_CONTEXT_IMPORTED_FIELDS(V)
 
@@ -404,7 +404,7 @@ class Context: public FixedArray {
 
   // Find the module context (assuming there is one) and return the associated
   // module object.
-  JSModule* module();
+  Module* module();
 
   // Get the context where var declarations will be hoisted to, which
   // may be the context itself.