exo: Rotate cursor snapshot for rotated displays

ui/display/display.cc

Index: ui/display/display.cc
diff --git a/ui/display/display.cc b/ui/display/display.cc
index ae0eb5118995c5a124651956c80f9ee9e52ef613..c0c429abe3bbfe0c80f7130401a6e301582b8db5 100644
--- a/ui/display/display.cc
+++ b/ui/display/display.cc
@@ -103,8 +103,9 @@ Display::Display(const Display& other) = default;
 
 Display::~Display() {}
 
-int Display::RotationAsDegree() const {
-  switch (rotation_) {
+// static
+int Display::RotationAsDegree(Rotation rotation) {
+  switch (rotation) {
     case ROTATE_0:
       return 0;
     case ROTATE_90:
@@ -118,6 +119,10 @@ int Display::RotationAsDegree() const {
   return 0;
 }
 
+int Display::RotationAsDegree() const {
+  return RotationAsDegree(rotation_);
+}
+
 void Display::SetRotationAsDegree(int rotation) {
   switch (rotation) {
     case 0: