Clean up useless code in InputMethodManagerImpl.

BUG=342336
TEST=None

Review URL: https://codereview.chromium.org/448923003

Cr-Commit-Position: refs/heads/master@{#288378}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288378 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

@@ -61,8 +61,7 @@ InputMethodManagerImpl::InputMethodManagerImpl(
     : delegate_(delegate.Pass()),
       state_(STATE_LOGIN_SCREEN),
       util_(delegate_.get()),
-      component_extension_ime_manager_(new ComponentExtensionIMEManager()),
-      weak_ptr_factory_(this) {
+      component_extension_ime_manager_(new ComponentExtensionIMEManager()) {
   if (base::SysInfo::IsRunningOnChromeOS())
     keyboard_.reset(ImeKeyboard::Create());
   else
@@ -790,7 +789,6 @@ InputMethodUtil* InputMethodManagerImpl::GetInputMethodUtil() {
 
 ComponentExtensionIMEManager*
     InputMethodManagerImpl::GetComponentExtensionIMEManager() {
-  DCHECK(thread_checker_.CalledOnValidThread());
   return component_extension_ime_manager_.get();
 }
 

chrome/browser/chromeos/input_method/input_method_manager_impl.h

@@ -203,10 +203,6 @@ class InputMethodManagerImpl : public InputMethodManager,
   // auto-repeat interval.
   scoped_ptr<ImeKeyboard> keyboard_;
 
-  base::ThreadChecker thread_checker_;
-
-  base::WeakPtrFactory<InputMethodManagerImpl> weak_ptr_factory_;
-
   // The engine map from extension_id to an engine.
   std::map<std::string, InputMethodEngineInterface*> engine_map_;