Various clean-ups after top-level lexical declarations are done.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 157d9139de76130377b28f71ed564dfe4519d08c..dfb452b2a2707f1a697cc248bcff8b8a3c995b84 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1567,7 +1567,7 @@ Local<Script> UnboundScript::BindToCurrentContext() {
       function_info(i::SharedFunctionInfo::cast(*obj), obj->GetIsolate());
   i::Handle<i::JSFunction> function =
       obj->GetIsolate()->factory()->NewFunctionFromSharedFunctionInfo(
-          function_info, obj->GetIsolate()->global_context());
+          function_info, obj->GetIsolate()->native_context());
   return ToApiHandle<Script>(function);
 }
 
@@ -1732,7 +1732,7 @@ Local<UnboundScript> ScriptCompiler::CompileUnbound(
     EXCEPTION_PREAMBLE(isolate);
     i::Handle<i::SharedFunctionInfo> result = i::Compiler::CompileScript(
         str, name_obj, line_offset, column_offset, is_shared_cross_origin,
-        isolate->global_context(), NULL, &script_data, options,
+        isolate->native_context(), NULL, &script_data, options,
         i::NOT_NATIVES_CODE);
     has_pending_exception = result.is_null();
     if (has_pending_exception && script_data != NULL) {
@@ -1777,17 +1777,6 @@ Local<Script> ScriptCompiler::Compile(
 ScriptCompiler::ScriptStreamingTask* ScriptCompiler::StartStreamingScript(
     Isolate* v8_isolate, StreamedSource* source, CompileOptions options) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
-  if (!isolate->global_context().is_null() &&
-      !isolate->global_context()->IsNativeContext()) {
-    // The context chain is non-trivial, and constructing the corresponding
-    // non-trivial Scope chain outside the V8 heap is not implemented. Don't
-    // stream the script. This will only occur if Harmony scoping is enabled and
-    // a previous script has introduced "let" or "const" variables. TODO(marja):
-    // Implement externalizing ScopeInfos and constructing non-trivial Scope
-    // chains independent of the V8 heap so that we can stream also in this
-    // case.
-    return NULL;
-  }
   return new i::BackgroundParsingTask(source->impl(), options,
                                       i::FLAG_stack_size, isolate);
 }
@@ -1824,7 +1813,7 @@ Local<Script> ScriptCompiler::Compile(Isolate* v8_isolate,
                                          v8::True(v8_isolate));
     }
     source->info->set_script(script);
-    source->info->SetContext(isolate->global_context());
+    source->info->SetContext(isolate->native_context());
 
     EXCEPTION_PREAMBLE(isolate);