Migrates Japanese IME IDs and stop migrating Chinese IME IDs.

chromeos/ime/input_method_manager.h

Index: chromeos/ime/input_method_manager.h
diff --git a/chromeos/ime/input_method_manager.h b/chromeos/ime/input_method_manager.h
index 586606d5f9a16f185936cd235c1c5acc770ed6e6..09ae5c5747b9e71c5296e62dcff34ac4a4afb52a 100644
--- a/chromeos/ime/input_method_manager.h
+++ b/chromeos/ime/input_method_manager.h
@@ -185,10 +185,8 @@ class CHROMEOS_EXPORT InputMethodManager {
   // If keyboard layout can be uset at login screen
   virtual bool IsLoginKeyboard(const std::string& layout) const = 0;
 
-  // Migrates the xkb id to extension-xkb id.
-  // TODO(shuchen): Remove this function after few milestones are passed.
-  // See: http://crbug.com/345604
-  virtual bool MigrateXkbInputMethods(
+  // Migrates the input method id to extension-based input method id.
+  virtual bool MigrateInputMethods(
       std::vector<std::string>* input_method_ids) = 0;
 };