Makes InputMethodMus deal with no connection

ui/aura/mus/input_method_mus.cc

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/mus/input_method_mus.h"
 
 #include <utility>
 
 #include "services/ui/public/interfaces/constants.mojom.h"
 #include "services/ui/public/interfaces/ime.mojom.h"
@@ skipping 15 matching lines @@
 
 InputMethodMus::InputMethodMus(ui::internal::InputMethodDelegate* delegate,
                                Window* window)
     : window_(window) {
   SetDelegate(delegate);
 }
 
 InputMethodMus::~InputMethodMus() {}
 
 void InputMethodMus::Init(service_manager::Connector* connector) {
-  connector->ConnectToInterface(ui::mojom::kServiceName, &ime_server_);
+  if (connector)
+    connector->ConnectToInterface(ui::mojom::kServiceName, &ime_server_);
 }
 
 void InputMethodMus::DispatchKeyEvent(
     ui::KeyEvent* event,
     std::unique_ptr<base::Callback<void(EventResult)>> ack_callback) {
   DCHECK(event->type() == ui::ET_KEY_PRESSED ||
          event->type() == ui::ET_KEY_RELEASED);
 
   // If no text input client, do nothing.
   if (!GetTextInputClient()) {
@@ skipping 70 matching lines @@
   return false;
 }
 
 void InputMethodMus::OnDidChangeFocusedClient(
     ui::TextInputClient* focused_before,
     ui::TextInputClient* focused) {
   InputMethodBase::OnDidChangeFocusedClient(focused_before, focused);
   UpdateTextInputType();
 
   text_input_client_ = base::MakeUnique<TextInputClientImpl>(focused);
-  ime_server_->StartSession(text_input_client_->CreateInterfacePtrAndBind(),
-                            GetProxy(&input_method_));
+  if (ime_server_) {
+    ime_server_->StartSession(text_input_client_->CreateInterfacePtrAndBind(),
+                              GetProxy(&input_method_));
+  }
 }
 
 void InputMethodMus::UpdateTextInputType() {
   ui::TextInputType type = GetTextInputType();
   mojo::TextInputStatePtr state = mojo::TextInputState::New();
   state->type = mojo::ConvertTo<mojo::TextInputType>(type);
   if (window_) {
     WindowPortMus* window_impl_mus = WindowPortMus::Get(window_);
     if (type != ui::TEXT_INPUT_TYPE_NONE)
       window_impl_mus->SetImeVisibility(true, std::move(state));
@@ skipping 19 matching lines @@
     event_result = EventResult::HANDLED;
   }
   // |ack_callback| can be null if the standard form of DispatchKeyEvent() is
   // called instead of the version which provides a callback. In mus+ash we
   // use the version with callback, but some unittests use the standard form.
   if (ack_callback)
     ack_callback->Run(event_result);
 }
 
 }  // namespace aura