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

chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h

Index: chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h
diff --git a/chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h b/chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h
index f84c6a5221d5c5987af6894b2d002a11a2849de6..ab326a49aec5cd2e3538846a0fc1261977b80419 100644
--- a/chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h
+++ b/chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h
@@ -28,7 +28,7 @@ class ComponentExtensionIMEManagerImpl
 
   // ComponentExtensionIMEManagerDelegate overrides:
   virtual std::vector<ComponentExtensionIME> ListIME() OVERRIDE;
-  virtual bool Load(Profile* profile,
+  virtual void Load(Profile* profile,
                     const std::string& extension_id,
                     const std::string& manifest,
                     const base::FilePath& file_path) OVERRIDE;
@@ -63,10 +63,6 @@ class ComponentExtensionIMEManagerImpl
   // The list of component extension IME.
   std::vector<ComponentExtensionIME> component_extension_list_;
 
-  // For checking the function should be called on UI thread.
-  base::ThreadChecker thread_checker_;
-  base::WeakPtrFactory<ComponentExtensionIMEManagerImpl> weak_ptr_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManagerImpl);
 };