Import the v8-i18n extension into v8

src/extensions/i18n/locale.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
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 //       with the distribution.
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 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
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 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// limitations under the License.
 
+#ifndef V8_EXTENSIONS_I18N_SRC_LOCALE_H_
+#define V8_EXTENSIONS_I18N_SRC_LOCALE_H_
+
+#include "unicode/uversion.h"
 #include "v8.h"
 
-#include "cctest.h"
+namespace v8_i18n {
 
-using namespace v8;
+// Canonicalizes the BCP47 language tag using BCP47 rules.
+// Returns 'invalid-tag' in case input was not well formed.
+void JSCanonicalizeLanguageTag(const v8::FunctionCallbackInfo<v8::Value>& args);
 
-// This test fails if properties on the prototype of the global object appear
-// as declared globals.
-TEST(StrictUndeclaredGlobalVariable) {
-  HandleScope scope(Isolate::GetCurrent());
-  v8::Local<v8::String> var_name = v8_str("x");
-  LocalContext context;
-  v8::TryCatch try_catch;
-  v8::Local<v8::Script> script = v8_compile("\"use strict\"; x = 42;");
-  v8::Handle<v8::Object> proto = v8::Object::New();
-  v8::Handle<v8::Object> global =
-      context->Global()->GetPrototype().As<v8::Object>();
-  proto->Set(var_name, v8_num(100));
-  global->SetPrototype(proto);
-  script->Run();
-  CHECK(try_catch.HasCaught());
-  v8::String::Utf8Value exception(try_catch.Exception());
-  CHECK_EQ("ReferenceError: x is not defined", *exception);
-}
+// Returns a list of available locales for collator, date or number formatter.
+void JSAvailableLocalesOf(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+// Returns default ICU locale.
+void JSGetDefaultICULocale(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+// Returns an array of objects, that have maximized and base names of inputs.
+// Unicode extensions are dropped from both.
+// Input: ['zh-TW-u-nu-thai', 'sr']
+// Output: [{maximized: 'zh-Hant-TW', base: 'zh-TW'},
+//          {maximized: 'sr-Cyrl-RS', base: 'sr'}]
+void JSGetLanguageTagVariants(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+}  // namespace v8_i18n
+
+#endif  // V8_EXTENSIONS_I18N_LOCALE_H_