Wires up WorkspaceLayoutManager in mash

ui/views/mus/platform_window_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/views/mus/platform_window_mus.h"
 
 #include "base/message_loop/message_loop.h"
 #include "build/build_config.h"
 #include "components/bitmap_uploader/bitmap_uploader.h"
 #include "components/mus/public/cpp/property_type_converters.h"
@@ skipping 68 matching lines @@
 #if defined(OS_WIN) || defined(OS_ANDROID)
   gfx::AcceleratedWidget accelerated_widget =
       reinterpret_cast<gfx::AcceleratedWidget>(accelerated_widget_count++);
 #else
   gfx::AcceleratedWidget accelerated_widget =
       static_cast<gfx::AcceleratedWidget>(accelerated_widget_count++);
 #endif
   delegate_->OnAcceleratedWidgetAvailable(
       accelerated_widget, mus_window_->viewport_metrics().device_pixel_ratio);
 
-  bitmap_uploader_.reset(new bitmap_uploader::BitmapUploader(mus_window_));
-  bitmap_uploader_->Init(connector);
-  prop_.reset(new ui::ViewProp(
-      accelerated_widget, bitmap_uploader::kBitmapUploaderForAcceleratedWidget,
-      bitmap_uploader_.get()));
+  if (connector) {
+    bitmap_uploader_.reset(new bitmap_uploader::BitmapUploader(mus_window_));
+    bitmap_uploader_->Init(connector);
+    prop_.reset(
+        new ui::ViewProp(accelerated_widget,
+                         bitmap_uploader::kBitmapUploaderForAcceleratedWidget,
+                         bitmap_uploader_.get()));
+  }
 }
 
 PlatformWindowMus::~PlatformWindowMus() {
   if (!mus_window_)
     return;
   mus_window_->set_input_event_handler(nullptr);
 }
 
 void PlatformWindowMus::Show() {}
 
@@ skipping 56 matching lines @@
 
   std::unique_ptr<ui::Event> event = ui::Event::Clone(event_in);
   delegate_->DispatchEvent(event.get());
   // NOTE: |this| may be deleted.
 
   ack_handler.set_handled(event->handled());
   // |ack_handler| acks the event on destruction if necessary.
 }
 
 }  // namespace views