Makes InputMethodMus deal with no connection

ui/aura/mus/window_tree_host_mus.cc

 // Copyright 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/window_tree_host_mus.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/input_method_mus.h"
 #include "ui/aura/mus/window_port_mus.h"
@@ skipping 15 matching lines @@
   return aura::Env::GetInstance()->context_factory()->DoesCreateTestContexts();
 }
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // WindowTreeHostMus, public:
 
 WindowTreeHostMus::WindowTreeHostMus(
     std::unique_ptr<WindowPortMus> window_port,
-    WindowTreeHostMusDelegate* delegate,
+    WindowTreeClient* window_tree_client,
     int64_t display_id,
     const std::map<std::string, std::vector<uint8_t>>* properties)
     : WindowTreeHostPlatform(std::move(window_port)),
       display_id_(display_id),
-      delegate_(delegate) {
+      delegate_(window_tree_client) {
   // TODO(sky): find a cleaner way to set this! Better solution is to likely
   // have constructor take aura::Window.
   WindowPortMus::Get(window())->window_ = window();
   if (properties) {
     // Apply the properties before initializing the window, that way the
     // server seems them at the time the window is created.
     WindowMus* window_mus = WindowMus::Get(window());
     for (auto& pair : *properties)
       window_mus->SetPropertyFromServer(pair.first, &pair.second);
   }
@@ skipping 16 matching lines @@
   // TODO(markdittmer): Use correct device-scale-factor from |window|.
   OnAcceleratedWidgetAvailable(accelerated_widget, 1.f);
 
   delegate_->OnWindowTreeHostCreated(this);
 
   SetPlatformWindow(base::MakeUnique<ui::StubWindow>(
       this,
       false));  // Do not advertise accelerated widget; already set manually.
 
   input_method_ = base::MakeUnique<InputMethodMus>(this, window());
+  input_method_->Init(window_tree_client->connector());
+  SetSharedInputMethod(input_method_.get());
 
   compositor()->SetHostHasTransparentBackground(true);
 
   // Mus windows are assumed hidden.
   compositor()->SetVisible(false);
 }
 
 WindowTreeHostMus::WindowTreeHostMus(
     WindowTreeClient* window_tree_client,
     const std::map<std::string, std::vector<uint8_t>>* properties)
@@ skipping 67 matching lines @@
 void WindowTreeHostMus::OnCloseRequest() {
   OnHostCloseRequested();
 }
 
 gfx::ICCProfile WindowTreeHostMus::GetICCProfileForCurrentDisplay() {
   // TODO: This should read the profile from mus. crbug.com/647510
   return gfx::ICCProfile();
 }
 
 }  // namespace aura