Introduce GetAllIMEAsInputMethodDescriptor function.

chromeos/ime/component_extension_ime_manager.h

Index: chromeos/ime/component_extension_ime_manager.h
diff --git a/chromeos/ime/component_extension_ime_manager.h b/chromeos/ime/component_extension_ime_manager.h
index b5acd43e7dcf98d0d25ca3430571860675fead6d..256745e4fa87dc20f4d724dc77bfe76b0c86cfa2 100644
--- a/chromeos/ime/component_extension_ime_manager.h
+++ b/chromeos/ime/component_extension_ime_manager.h
@@ -9,6 +9,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/ibus/ibus_component.h"
+#include "chromeos/ime/input_method_descriptor.h"
 
 namespace chromeos {
 
@@ -77,6 +78,9 @@ class CHROMEOS_EXPORT ComponentExtensionIMEManager {
   // Returns list of input method id associated with |language|.
   std::vector<std::string> ListIMEByLanguage(const std::string& language);
 
+  // Returns all IME as InputMethodDescriptors.
+  input_method::InputMethodDescriptors GetAllIMEAsInputMethodDescriptor();
+
  private:
   // Finds ComponentExtensionIME and EngineDescription associated with
   // |input_method_id|. This function retruns true if it is found, otherwise