Defer computing localeForHan until needed

third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp

Index: third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp b/third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp
index 5ae67b7cc5ae5b0103f2bab17a1e5c952d6cbc97..4dd49562edd28f30f1d677543ce36a34126585e4 100644
--- a/third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp
+++ b/third_party/WebKit/Source/platform/fonts/AcceptLanguagesResolver.cpp
@@ -8,11 +8,25 @@
 
 namespace blink {
 
+static String& current()

[drott, 2016/08/08 15:16:37]

Could you give this a more descriptive name?

[kojii, 2016/08/08 15:33:54]

Changed to currentAcceptLanguages().

+{
+    DEFINE_STATIC_LOCAL(String, s_current, ());
+    return s_current;
+}
+
 void AcceptLanguagesResolver::acceptLanguagesChanged(
     const String& acceptLanguages)
 {
-    LayoutLocale::setLocaleForHan(
-        localeForHanFromAcceptLanguages(acceptLanguages));
+    if (current() == acceptLanguages)
+        return;
+
+    current() = acceptLanguages;
+    LayoutLocale::InvalidateLocaleForHan();
+}
+
+const LayoutLocale* AcceptLanguagesResolver::localeForHan()
+{
+    return localeForHanFromAcceptLanguages(current());
 }
 
 const LayoutLocale* AcceptLanguagesResolver::localeForHanFromAcceptLanguages(