Support comma separated hardware keyboard layout.

chrome/browser/chromeos/input_method/input_method_util.h

Index: chrome/browser/chromeos/input_method/input_method_util.h
diff --git a/chrome/browser/chromeos/input_method/input_method_util.h b/chrome/browser/chromeos/input_method/input_method_util.h
index 50092b456a93b389ca348095a887ea885ef3cbd0..d61babded181d76672d5d4c2f3fe039e7cf11363 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.h
+++ b/chrome/browser/chromeos/input_method/input_method_util.h
@@ -13,6 +13,7 @@
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
+#include "base/threading/thread_checker.h"
 #include "chromeos/ime/input_method_descriptor.h"
 
 namespace chromeos {
@@ -97,12 +98,15 @@ class InputMethodUtil {
   // Returns empty string on error.
   std::string GetLanguageDefaultInputMethodId(const std::string& language_code);
 
-  // Returns the input method ID of the hardware keyboard. e.g. "xkb:us::eng"
-  // for the US Qwerty keyboard.
-  std::string GetHardwareInputMethodId() const;
+  // Updates the internal cache of hardware layouts.
+  void UpdateHardwareLayoutCache();
+
+  // Fills the input method IDs of the hardware keyboard. e.g. "xkb:us::eng"
+  // for the US Qwerty keyboard. |out| must not be NULL.
+  const std::vector<std::string>& GetHardwareInputMethodIds();
 
   // Returns the login-allowed input method ID of the hardware keyboard.
-  std::string GetHardwareLoginInputMethodId() const;
+  const std::vector<std::string>& GetHardwareLoginInputMethodIds();
 
   // Returns true if given input method can be used to input login data.
   bool IsLoginKeyboard(const std::string& input_method_id) const;
@@ -173,6 +177,10 @@ class InputMethodUtil {
 
   InputMethodDelegate* delegate_;
 
+  base::ThreadChecker thread_checker_;
+  std::vector<std::string> hardware_layouts_;
+  std::vector<std::string> hardware_login_layouts_;
+
   DISALLOW_COPY_AND_ASSIGN(InputMethodUtil);
 };