// Returns the primary display.
virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
- UIScreen* mainScreen = [[UIScreen screens] objectAtIndex:0];
+ UIScreen* mainScreen = [UIScreen mainScreen];
+ CHECK(mainScreen);
gfx::Display display(0, gfx::Rect(mainScreen.bounds));
display.set_device_scale_factor([mainScreen scale]);
return display;