Mojo C++ bindings: switch services/ui/public/interfaces mojom target to use STL types.

services/ui/ws/display.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 "services/ui/ws/display.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 182 matching lines @@
   if (cursor_id != last_cursor_) {
     platform_display_->SetCursorById(cursor_id);
     last_cursor_ = cursor_id;
   }
 }
 
 void Display::SetSize(const gfx::Size& size) {
   platform_display_->SetViewportSize(size);
 }
 
-void Display::SetTitle(const mojo::String& title) {
-  platform_display_->SetTitle(title.To<base::string16>());
+void Display::SetTitle(const std::string& title) {
+  platform_display_->SetTitle(base::UTF8ToUTF16(title));
 }
 
 void Display::InitWindowManagerDisplayRoots() {
   if (binding_) {
     std::unique_ptr<WindowManagerDisplayRoot> display_root_ptr(
         new WindowManagerDisplayRoot(this));
     WindowManagerDisplayRoot* display_root = display_root_ptr.get();
     // For this case we never create additional displays roots, so any
     // id works.
     window_manager_display_root_map_[service_manager::mojom::kRootUserID] =
@@ skipping 165 matching lines @@
 }
 
 void Display::OnWindowManagerWindowTreeFactoryReady(
     WindowManagerWindowTreeFactory* factory) {
   if (!binding_)
     CreateWindowManagerDisplayRootFromFactory(factory);
 }
 
 }  // namespace ws
 }  // namespace ui