PDF: Use chrome.resourcesPrivate instead of Pepper to display translated strings

ppapi/cpp/private/pdf.cc

Index: ppapi/cpp/private/pdf.cc
diff --git a/ppapi/cpp/private/pdf.cc b/ppapi/cpp/private/pdf.cc
index 24127f106895042b5cf11d45badd0d5681bf6ed5..350d87005442693fc840fdcbae9443d903a333b9 100644
--- a/ppapi/cpp/private/pdf.cc
+++ b/ppapi/cpp/private/pdf.cc
@@ -26,17 +26,6 @@ bool PDF::IsAvailable() {
 }
 
 // static
-Var PDF::GetLocalizedString(const InstanceHandle& instance,
-                            PP_ResourceString string_id) {
-  if (has_interface<PPB_PDF>()) {
-    return Var(PASS_REF,
-               get_interface<PPB_PDF>()->GetLocalizedString(
-                   instance.pp_instance(), string_id));
-  }
-  return Var();
-}
-
-// static
 PP_Resource PDF::GetFontFileWithFallback(
     const InstanceHandle& instance,
     const PP_BrowserFont_Trusted_Description* description,