Handle modified displays in mustash.

services/ui/display/viewport_metrics.h

Index: services/ui/display/viewport_metrics.h
diff --git a/services/ui/display/viewport_metrics.h b/services/ui/display/viewport_metrics.h
new file mode 100644
index 0000000000000000000000000000000000000000..b8be4f00989c5dbce0dc41203aa95e37273a54df
--- /dev/null
+++ b/services/ui/display/viewport_metrics.h
@@ -0,0 +1,36 @@
+// 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.
+
+#ifndef SERVICES_UI_DISPLAY_VIEWPORT_METRICS_H_
+#define SERVICES_UI_DISPLAY_VIEWPORT_METRICS_H_
+
+#include "ui/display/display.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace display {
+
+struct ViewportMetrics {
+  std::string ToString() const;
+
+  gfx::Rect bounds;     // DIP.
+  gfx::Rect work_area;  // DIP.
+  gfx::Size pixel_size;
+  Display::Rotation rotation = Display::ROTATE_0;
+  float device_scale_factor = 0.0f;
+};
+
+inline bool operator==(const ViewportMetrics& lhs, const ViewportMetrics& rhs) {
+  return lhs.bounds == rhs.bounds && lhs.work_area == rhs.work_area &&
+         lhs.pixel_size == rhs.pixel_size && lhs.rotation == rhs.rotation &&
+         lhs.device_scale_factor == rhs.device_scale_factor;
+}
+
+inline bool operator!=(const ViewportMetrics& lhs, const ViewportMetrics& rhs) {
+  return !(lhs == rhs);
+}
+
+}  // namespace display
+
+#endif  // SERVICES_UI_DISPLAY_VIEWPORT_METRICS_H_