Use ICU case conversion/transliterator for case conversion behind a flag

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index bad8c46617fd659dcf4466aaca256cddcb16ad17..6ddd7a787d52ad3c5fccf0ae1054ac738f7f100f 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -200,6 +200,7 @@ class Genesis BASE_EMBEDDED {
   HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION)
   HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION)
   DECLARE_FEATURE_INITIALIZATION(promise_extra, "")
+  DECLARE_FEATURE_INITIALIZATION(icu_case_mapping, "")

[Yang, 2016/04/29 07:38:47]

Is this necessary? We declare it here, call it below, only to define it as empty
function. I get it that we need to do it for flags in the harmony list macros,
since some do have non-empty initialize functions. But I don't see the necessity
here.

[jungshik at Google, 2016/04/29 18:03:23]

Indeed. I dropped them all (decl, call, definition) and it worked well as
before. 

Even though it's not relevant to this CL, I wonder if the same thing has to be
done for promise_extra.  Dan, is there a reason to have an 'empty' function
defined, declared and called? 

[Dan Ehrenberg, 2016/05/03 17:58:17]

promise_extra was special in this way. This should just be a HARMONY_INPROGRESS
feature.

 #undef DECLARE_FEATURE_INITIALIZATION
 
   Handle<JSFunction> InstallArrayBuffer(Handle<JSObject> target,
@@ -1931,6 +1932,7 @@ void Genesis::InitializeExperimentalGlobal() {
   HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL)
   HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL)
   FEATURE_INITIALIZE_GLOBAL(promise_extra, "")
+  FEATURE_INITIALIZE_GLOBAL(icu_case_mapping, "")
 #undef FEATURE_INITIALIZE_GLOBAL
 }
 
@@ -2433,6 +2435,7 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_instanceof)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_restrictive_declarations)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_exponentiation_operator)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_string_padding)
+EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(icu_case_mapping)
 
 void InstallPublicSymbol(Factory* factory, Handle<Context> native_context,
                          const char* name, Handle<Symbol> value) {
@@ -2999,6 +3002,8 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_exponentiation_operator_natives[] = {nullptr};
   static const char* harmony_string_padding_natives[] = {
       "native harmony-string-padding.js", nullptr};
+  static const char* icu_case_mapping_natives[] = {"native icu-case-mapping.js",
+                                                   nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {
@@ -3018,6 +3023,7 @@ bool Genesis::InstallExperimentalNatives() {
     HARMONY_STAGED(INSTALL_EXPERIMENTAL_NATIVES);
     HARMONY_SHIPPING(INSTALL_EXPERIMENTAL_NATIVES);
     INSTALL_EXPERIMENTAL_NATIVES(promise_extra, "");
+    INSTALL_EXPERIMENTAL_NATIVES(icu_case_mapping, "");
 #undef INSTALL_EXPERIMENTAL_NATIVES
   }