Lock rotation when screen is manually rotated.

ash/display/virtual_keyboard_window_controller.cc

Index: ash/display/virtual_keyboard_window_controller.cc
diff --git a/ash/display/virtual_keyboard_window_controller.cc b/ash/display/virtual_keyboard_window_controller.cc
index 1cec588a2022ae7007a34d13fa09152a69ed2a8d..d0e09ff33286b3b8470c7648bd664b8847a78e4e 100644
--- a/ash/display/virtual_keyboard_window_controller.cc
+++ b/ash/display/virtual_keyboard_window_controller.cc
@@ -18,6 +18,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window_event_dispatcher.h"
+#include "ui/display/types/display_constants.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_util.h"
 
@@ -84,7 +85,8 @@ void VirtualKeyboardWindowController::FlipDisplay() {
     return;
   }
   display_manager->SetDisplayRotation(
-      display_manager->non_desktop_display().id(), gfx::Display::ROTATE_180);
+      display_manager->non_desktop_display().id(), gfx::Display::ROTATE_180,
+      ui::USER);
 
   aura::WindowTreeHost* host = root_window_controller_->GetHost();
   scoped_ptr<RootWindowTransformer> transformer(