Support comma separated hardware keyboard layout.

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 c86a07eb8c446cf2e816caa8370e53c55e0bbdd5..6e8b5bb6f33407f74527d80775471f81f64f2b89 100644
--- a/chromeos/ime/input_method_manager.h
+++ b/chromeos/ime/input_method_manager.h
@@ -116,14 +116,15 @@ class CHROMEOS_EXPORT InputMethodManager {
 
   // Enables "login" keyboard layouts (e.g. US Qwerty, US Dvorak, French
   // Azerty) that are necessary for the |language_code| and then switches to
-  // |initial_layout| if the string is not empty. For example, if
+  // |initial_layouts| if the given list is not empty. For example, if
   // |language_code| is "en-US", US Qwerty, US International, US Extended, US
   // Dvorak, and US Colemak layouts would be enabled. Likewise, for Germany
   // locale, US Qwerty which corresponds to the hardware keyboard layout and
   // several keyboard layouts for Germany would be enabled.
-  //   Only layouts suitable for login screen are enabled.
-  virtual void EnableLoginLayouts(const std::string& language_code,
-                                  const std::string& initial_layout) = 0;
+  // Only layouts suitable for login screen are enabled.
+  virtual void EnableLoginLayouts(
+      const std::string& language_code,
+      const std::vector<std::string>& initial_layouts) = 0;
 
   // Activates the input method property specified by the |key|.
   virtual void ActivateInputMethodProperty(const std::string& key) = 0;