Add DisplayPlacement/Layout mojoms + StructTraits.

ui/display/mojo/display_struct_traits.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 "ui/display/mojo/display_struct_traits.h"
 
 #include "ui/gfx/geometry/mojo/geometry_struct_traits.h"
 
 namespace mojo {
 
@@ skipping 58 matching lines @@
       *out = display::Display::TOUCH_SUPPORT_UNKNOWN;
       return true;
     case display::mojom::TouchSupport::AVAILABLE:
       *out = display::Display::TOUCH_SUPPORT_AVAILABLE;
       return true;
     case display::mojom::TouchSupport::UNAVAILABLE:
       *out = display::Display::TOUCH_SUPPORT_UNAVAILABLE;
       return true;
   }
   NOTREACHED();
-  return display::Display::TOUCH_SUPPORT_UNKNOWN;
+  return false;
 }
 
 bool StructTraits<display::mojom::DisplayDataView, display::Display>::Read(
     display::mojom::DisplayDataView data,
     display::Display* out) {
   out->set_id(data.id());
 
   if (!data.ReadBounds(&out->bounds_))
     return false;
 
   if (!data.ReadWorkArea(&out->work_area_))
     return false;
 
   out->set_device_scale_factor(data.device_scale_factor());
 
   if (!data.ReadRotation(&out->rotation_))
     return false;
 
   if (!data.ReadTouchSupport(&out->touch_support_))
     return false;
 
   if (!data.ReadMaximumCursorSize(&out->maximum_cursor_size_))
     return false;
 
   return true;
 }
 
 }  // namespace mojo