[strong] Remove all remainders of strong mode

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index a31e6a71fbbff3b1d00de103af1eb534c0381d28..5f754fc30630f0718145f9c0191f67c5c5825dd9 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1558,12 +1558,7 @@ Handle<SharedFunctionInfo> Compiler::CompileScript(
   isolate->counters()->total_load_size()->Increment(source_length);
   isolate->counters()->total_compile_size()->Increment(source_length);
 
-  // TODO(rossberg): The natives do not yet obey strong mode rules
-  // (for example, some macros use '==').
-  bool use_strong = FLAG_use_strong && !isolate->bootstrapper()->IsActive();
-  LanguageMode language_mode =
-      construct_language_mode(FLAG_use_strict, use_strong);
-
+  LanguageMode language_mode = construct_language_mode(FLAG_use_strict);
   CompilationCache* compilation_cache = isolate->compilation_cache();
 
   // Do a lookup in the compilation cache but not for extensions.
@@ -1676,8 +1671,7 @@ Handle<SharedFunctionInfo> Compiler::CompileStreamedScript(
   isolate->counters()->total_load_size()->Increment(source_length);
   isolate->counters()->total_compile_size()->Increment(source_length);
 
-  LanguageMode language_mode =
-      construct_language_mode(FLAG_use_strict, FLAG_use_strong);
+  LanguageMode language_mode = construct_language_mode(FLAG_use_strict);
   parse_info->set_language_mode(
       static_cast<LanguageMode>(parse_info->language_mode() | language_mode));