CrOS Tablet Window management - Split Screen part I

ash/wm/workspace/backdrop_controller.cc

Index: ash/wm/workspace/backdrop_controller.cc
diff --git a/ash/wm/workspace/backdrop_controller.cc b/ash/wm/workspace/backdrop_controller.cc
index 2473771ad81fe5d7d24d92c776df21d28c5e8115..05b6d940b1d3dc2902248977b6eaa5237a56c865 100644
--- a/ash/wm/workspace/backdrop_controller.cc
+++ b/ash/wm/workspace/backdrop_controller.cc
@@ -140,6 +140,19 @@ void BackdropController::OnOverviewModeStarting() {
 }
 
 void BackdropController::OnOverviewModeEnded() {
+  if (Shell::Get()->IsSplitViewModeActive())
+    return;
+
+  force_hidden_ = false;
+  UpdateBackdrop();
+}
+
+void BackdropController::OnSplitViewModeStarting() {
+  force_hidden_ = true;
+  Hide();
+}
+
+void BackdropController::OnSplitViewModeEnded() {
   force_hidden_ = false;
   UpdateBackdrop();
 }