Hotword Private API: Add support for retrieving localized strings.

chrome/common/extensions/api/hotword_private.idl

Index: chrome/common/extensions/api/hotword_private.idl
diff --git a/chrome/common/extensions/api/hotword_private.idl b/chrome/common/extensions/api/hotword_private.idl
index fa07067626d350e374ab3e8f0294cae2eca1942f..d7bdb045df2d9c2a52b1a4b37a1a4b63a82c527e 100644
--- a/chrome/common/extensions/api/hotword_private.idl
+++ b/chrome/common/extensions/api/hotword_private.idl
@@ -53,6 +53,7 @@
 
   callback GenericDoneCallback = void ();
   callback LaunchStateCallback = void(LaunchState result);
+  callback LocalizeStringsCallback = void(object result);
   callback StatusDetailsCallback = void(StatusDetails result);
 
   interface Functions {
@@ -65,6 +66,9 @@
     // The result is put into a StatusDetails object.
     static void getStatus(StatusDetailsCallback callback);
 
+    // Retrieves a dictionary mapping names to localized resource strings.
+    static void getLocalizedStrings(LocalizeStringsCallback callback);
+
     // Sets the current enabled state of audio logging in the extension.
     // True: logging enabled. False: no logging.
     static void setAudioLoggingEnabled(boolean state,