Convert //mash to define service names in mojom

mash/task_viewer/task_viewer.h

Index: mash/task_viewer/task_viewer.h
diff --git a/mash/task_viewer/task_viewer.h b/mash/task_viewer/task_viewer.h
index 1190c34d9d0822e342f4296b4cd8b9dd9f26503f..cf1b8ecdd58dc28eb45da7437f1756175361e794 100644
--- a/mash/task_viewer/task_viewer.h
+++ b/mash/task_viewer/task_viewer.h
@@ -25,9 +25,10 @@ class WindowManagerConnection;
 namespace mash {
 namespace task_viewer {
 
-class TaskViewer : public service_manager::Service,
-                   public mojom::Launchable,
-                   public service_manager::InterfaceFactory<mojom::Launchable> {
+class TaskViewer
+    : public service_manager::Service,
+      public ::mash::mojom::Launchable,
+      public service_manager::InterfaceFactory<::mash::mojom::Launchable> {
  public:
   TaskViewer();
   ~TaskViewer() override;
@@ -40,14 +41,14 @@ class TaskViewer : public service_manager::Service,
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
-  // mojom::Launchable:
-  void Launch(uint32_t what, mojom::LaunchMode how) override;
+  // ::mash::mojom::Launchable:
+  void Launch(uint32_t what, ::mash::mojom::LaunchMode how) override;
 
-  // service_manager::InterfaceFactory<mojom::Launchable>:
+  // service_manager::InterfaceFactory<::mash::mojom::Launchable>:
   void Create(const service_manager::Identity& remote_identity,
-              mojom::LaunchableRequest request) override;
+              ::mash::mojom::LaunchableRequest request) override;
 
-  mojo::BindingSet<mojom::Launchable> bindings_;
+  mojo::BindingSet<::mash::mojom::Launchable> bindings_;
   std::vector<views::Widget*> windows_;
 
   tracing::Provider tracing_;