Revert of Support device scale factor test with popups in LayoutTest

content/shell/browser/blink_test_controller.cc

Index: content/shell/browser/blink_test_controller.cc
diff --git a/content/shell/browser/blink_test_controller.cc b/content/shell/browser/blink_test_controller.cc
index c34a71663a15c22b8eda1df3ecdf19bf3cd93199..7b55670058ae32bf91f4c5ad6ffb647b9f2ec954 100644
--- a/content/shell/browser/blink_test_controller.cc
+++ b/content/shell/browser/blink_test_controller.cc
@@ -413,8 +413,6 @@ bool BlinkTestController::OnMessageReceived(const IPC::Message& message) {
                         OnGetBluetoothManualChooserEvents)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_SendBluetoothManualChooserEvent,
                         OnSendBluetoothManualChooserEvent)
-    IPC_MESSAGE_HANDLER(ShellViewHostMsg_SetDeviceScaleFactor,
-                        OnSetDeviceScaleFactor)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -774,8 +772,4 @@ void BlinkTestController::OnSendBluetoothManualChooserEvent(
   bluetooth_chooser_factory_->SendEvent(event, argument);
 }
 
-void BlinkTestController::OnSetDeviceScaleFactor(float scale) {
-  main_window_->SetDeviceScaleFactor(scale);
-}
-
 }  // namespace content