Convert //mash to define service names in mojom

ash/mus/keyboard_ui_mus.cc

 // Copyright 2016 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 "ash/mus/keyboard_ui_mus.h"
 
 #include "ash/common/keyboard/keyboard_ui_observer.h"
 #include "base/memory/ptr_util.h"
+#include "content/public/common/service_names.mojom.h"
 #include "services/service_manager/public/cpp/connector.h"
 
 namespace ash {
 
 KeyboardUIMus::KeyboardUIMus(service_manager::Connector* connector)
     : is_enabled_(false), observer_binding_(this) {
   if (connector) {
     // TODO(sky): should be something like mojo:keyboard, but need mapping.
-    connector->ConnectToInterface("content_browser", &keyboard_);
+    connector->ConnectToInterface(content::mojom::kBrowserServiceName,
+                                  &keyboard_);
     keyboard_->AddObserver(observer_binding_.CreateInterfacePtrAndBind());
   }
 }
 
 KeyboardUIMus::~KeyboardUIMus() {}
 
 // static
 std::unique_ptr<KeyboardUI> KeyboardUIMus::Create(
     service_manager::Connector* connector) {
   return base::MakeUnique<KeyboardUIMus>(connector);
@@ skipping 17 matching lines @@
                                            const gfx::Rect& bounds) {
   if (is_enabled_ == is_enabled)
     return;
 
   is_enabled_ = is_enabled;
   for (auto& observer : *observers())
     observer.OnKeyboardEnabledStateChanged(is_enabled);
 }
 
 }  // namespace ash