Extract Extension IME related utility.

chrome/browser/chromeos/input_method/input_method_util.cc

Index: chrome/browser/chromeos/input_method/input_method_util.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_util.cc b/chrome/browser/chromeos/input_method/input_method_util.cc
index e7faf456bc91412610c80db71f2651ae18229d1d..d3654fb9f71645ea27c49aa0ff328d6a6176f3e7 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.cc
+++ b/chrome/browser/chromeos/input_method/input_method_util.cc
@@ -15,6 +15,7 @@
 #include "base/string_util.h"
 #include "base/strings/string_split.h"
 #include "base/utf_string_conversions.h"
+#include "chromeos/ime/extension_ime_util.h"
 #include "chromeos/ime/input_method_delegate.h"
 #include "grit/generated_resources.h"
 #include "third_party/icu/public/common/unicode/uloc.h"
@@ -367,15 +368,6 @@ bool InputMethodUtil::IsKeyboardLayout(const std::string& input_method_id) {
   return StartsWithASCII(input_method_id, "xkb:", kCaseInsensitive);
 }
 
-// static
-bool InputMethodUtil::IsExtensionInputMethod(
-    const std::string& input_method_id) {
-  const bool kCaseInsensitive = false;
-  return StartsWithASCII(input_method_id,
-                         kExtensionImePrefix,
-                         kCaseInsensitive);
-}
-
 std::string InputMethodUtil::GetLanguageCodeFromInputMethodId(
     const std::string& input_method_id) const {
   // The code should be compatible with one of codes used for UI languages,
@@ -400,7 +392,7 @@ std::string InputMethodUtil::GetKeyboardLayoutName(
 std::string InputMethodUtil::GetInputMethodDisplayNameFromId(
     const std::string& input_method_id) const {
   string16 display_name;
-  if (!IsExtensionInputMethod(input_method_id) &&
+  if (!extension_ime_util::IsExtensionIME(input_method_id) &&
       TranslateStringInternal(input_method_id, &display_name)) {
     return UTF16ToUTF8(display_name);
   }