Add accelerometer support property to Display.

ash/display/screen_ash.cc

Index: ash/display/screen_ash.cc
diff --git a/ash/display/screen_ash.cc b/ash/display/screen_ash.cc
index e1a7a9ea44012ef7b0fc5216961fdec499f24ca7..e70460f61a9954ddcc9a19598506a43cb76d19f6 100644
--- a/ash/display/screen_ash.cc
+++ b/ash/display/screen_ash.cc
@@ -4,12 +4,14 @@
 
 #include "ash/display/screen_ash.h"
 
+#include "ash/ash_switches.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/root_window_settings.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/wm/root_window_finder.h"
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
@@ -184,7 +186,13 @@ display::DisplayManager* ScreenAsh::CreateDisplayManager() {
   // use ash's screen.
   if (!current || current == screen_for_shutdown)
     display::Screen::SetScreenInstance(screen.get());
-  return new display::DisplayManager(std::move(screen));
+  display::DisplayManager* manager =
+      new display::DisplayManager(std::move(screen));
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshEnableTouchView)) {
+    manager->set_internal_display_has_accelerometer(true);
+  }
+  return manager;
 }
 
 // static