IME for Mus: Make InputMethodMus use the IME Mojo API.

ui/views/mus/window_tree_host_mus.h

Index: ui/views/mus/window_tree_host_mus.h
diff --git a/ui/views/mus/window_tree_host_mus.h b/ui/views/mus/window_tree_host_mus.h
index fa096fcadd8cc0f52a121292d877ed508adc1d6b..a606553260663648ea91c8a8b56dee70398b92e5 100644
--- a/ui/views/mus/window_tree_host_mus.h
+++ b/ui/views/mus/window_tree_host_mus.h
@@ -6,6 +6,7 @@
 #define UI_VIEWS_MUS_WINDOW_TREE_HOST_MUS_H_
 
 #include "base/macros.h"
+#include "services/shell/public/cpp/connector.h"
 #include "ui/aura/window_tree_host_platform.h"
 #include "ui/views/mus/mus_export.h"
 
@@ -21,7 +22,7 @@ class Connector;
 
 namespace views {
 
-class InputMethodMUS;
+class InputMethodMus;
 class NativeWidgetMus;
 class PlatformWindowMus;
 
@@ -31,6 +32,8 @@ class VIEWS_MUS_EXPORT WindowTreeHostMus : public aura::WindowTreeHostPlatform {
   ~WindowTreeHostMus() override;
   NativeWidgetMus* native_widget() { return native_widget_; }
 
+  void InitInputMethod(shell::Connector* connector);
+
  private:
   // aura::WindowTreeHostPlatform:
   void DispatchEvent(ui::Event* event) override;
@@ -39,7 +42,7 @@ class VIEWS_MUS_EXPORT WindowTreeHostMus : public aura::WindowTreeHostPlatform {
   void OnCloseRequest() override;
 
   NativeWidgetMus* native_widget_;
-  std::unique_ptr<InputMethodMUS> input_method_;
+  std::unique_ptr<InputMethodMus> input_method_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostMus);
 };