Remove unused exports container field.

R=petermarshall@chromium.org

Change-Id: If181ed625015105f8bbabf29a9db3cfcf090b80a
Reviewed-on: https://chromium-review.googlesource.com/574235Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46709}

src/bootstrapper.cc

@@ -3628,7 +3628,6 @@ void Genesis::ConfigureUtilsObject(GlobalContextType context_type) {
   // The utils object can be removed for cases that reach this point.
   native_context()->set_natives_utils_object(heap()->undefined_value());
   native_context()->set_extras_utils_object(heap()->undefined_value());
-  native_context()->set_exports_container(heap()->undefined_value());
 }
 
 
@@ -4050,7 +4049,6 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
       }
     }
   }
-  isolate->native_context()->set_exports_container(*container);
 }
 
 

src/contexts.h

@@ -401,7 +401,6 @@ enum ContextLookupFlags {
   V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun)                      \
   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
-  V(EXPORTS_CONTAINER, Object, exports_container)                              \
   NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                                        \
   NATIVE_CONTEXT_IMPORTED_FIELDS(V)                                            \
   NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V)