Check the IME component extension's availability on linux_chromeos, so that system fallback VK can …

chromeos/ime/mock_component_extension_ime_manager_delegate.cc

Index: chromeos/ime/mock_component_extension_ime_manager_delegate.cc
diff --git a/chromeos/ime/mock_component_extension_ime_manager_delegate.cc b/chromeos/ime/mock_component_extension_ime_manager_delegate.cc
index ff9c3f4d6d5875a027bcd2cf370f139a067ca14c..f7914639119572842ee5267d471ea6a34d679db3 100644
--- a/chromeos/ime/mock_component_extension_ime_manager_delegate.cc
+++ b/chromeos/ime/mock_component_extension_ime_manager_delegate.cc
@@ -23,13 +23,12 @@ std::vector<ComponentExtensionIME>
   return ime_list_;
 }
 
-bool MockComponentExtIMEManagerDelegate::Load(Profile* profile,
+void MockComponentExtIMEManagerDelegate::Load(Profile* profile,
                                               const std::string& extension_id,
                                               const std::string& manifest,
                                               const base::FilePath& path) {
   last_loaded_extension_id_ = extension_id;
   load_call_count_++;
-  return true;
 }
 
 void MockComponentExtIMEManagerDelegate::Unload(Profile* profile,