[IME] Removes the duplicated IMEs in chrome://settings/languages, and support async component IMEs …

chromeos/ime/component_extension_ime_manager.cc

Index: chromeos/ime/component_extension_ime_manager.cc
diff --git a/chromeos/ime/component_extension_ime_manager.cc b/chromeos/ime/component_extension_ime_manager.cc
index 3037326346bc5fd82b4e6b8e86efcae556505206..e33ce3eb59b95c17fa916093f68d625f97ebb3e5 100644
--- a/chromeos/ime/component_extension_ime_manager.cc
+++ b/chromeos/ime/component_extension_ime_manager.cc
@@ -76,7 +76,7 @@ ComponentExtensionIMEManagerDelegate::~ComponentExtensionIMEManagerDelegate() {
 }
 
 ComponentExtensionIMEManager::ComponentExtensionIMEManager()
-    : is_initialized_(false) {
+    : is_initialized_(false), was_initialization_notified_(false) {
   for (size_t i = 0; i < arraysize(kLoginLayoutWhitelist); ++i) {
     login_layout_set_.insert(kLoginLayoutWhitelist[i]);
   }
@@ -90,7 +90,14 @@ void ComponentExtensionIMEManager::Initialize(
   delegate_ = delegate.Pass();
   component_extension_imes_ = delegate_->ListIME();
   is_initialized_ = true;
-  FOR_EACH_OBSERVER(Observer, observers_, OnInitialized());
+}
+
+void ComponentExtensionIMEManager::NotifyInitialized() {
+  if (is_initialized_ && !was_initialization_notified_) {
+    FOR_EACH_OBSERVER(
+        Observer, observers_, OnImeComponentExtensionInitialized());
+    was_initialization_notified_ = true;
+  }
 }
 
 bool ComponentExtensionIMEManager::IsInitialized() {
@@ -203,6 +210,18 @@ input_method::InputMethodDescriptors
   return result;
 }
 
+input_method::InputMethodDescriptors
+ComponentExtensionIMEManager::GetXkbIMEAsInputMethodDescriptor() {
+  input_method::InputMethodDescriptors result;
+  const input_method::InputMethodDescriptors& descriptors =
+      GetAllIMEAsInputMethodDescriptor();
+  for (size_t i = 0; i < descriptors.size(); ++i) {
+    if (extension_ime_util::IsKeyboardLayoutExtension(descriptors[i].id()))
+      result.push_back(descriptors[i]);
+  }
+  return result;
+}
+
 void ComponentExtensionIMEManager::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }