Handle modified displays in mustash.

services/ui/display/viewport_metrics.cc

Index: services/ui/display/viewport_metrics.cc
diff --git a/services/ui/display/viewport_metrics.cc b/services/ui/display/viewport_metrics.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7ad2bec74ad066c03b4c81821ea9532843bd8434
--- /dev/null
+++ b/services/ui/display/viewport_metrics.cc
@@ -0,0 +1,39 @@
+// 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 "services/ui/display/viewport_metrics.h"
+
+#include "base/strings/stringprintf.h"
+
+namespace display {
+
+namespace {
+
+std::string RotationString(Display::Rotation rotation) {
+  switch (rotation) {
+    case Display::ROTATE_0:
+      return "0";
+    case Display::ROTATE_90:
+      return "90";
+    case Display::ROTATE_180:
+      return "180";
+    case Display::ROTATE_270:
+      return "270";
+  }
+  NOTREACHED();
+  return "Invalid Rotation";
+}
+
+}  // namespace
+
+std::string ViewportMetrics::ToString() const {
+  return base::StringPrintf(
+      "ViewportMetrics(bounds=%s, work_area=%s, pixel_size=%s, "
+      "rotation=%s, device_scale_factor=%g)",
+      bounds.ToString().c_str(), work_area.ToString().c_str(),
+      pixel_size.ToString().c_str(), RotationString(rotation).c_str(),
+      device_scale_factor);
+}
+
+}  // namespace display