Provide iOS implementation of screen.h.

ui/gfx/screen_ios.mm

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.

[stuartmorgan, 2012/08/23 19:20:19]

2012

[blundell, 2012/08/30 09:18:51]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/gfx/screen.h"
+
+#import <UIKit/UIKit.h>
+
+#include "ui/gfx/display.h"
+
+namespace gfx {
+
+// static
+gfx::Display Screen::GetPrimaryDisplay() {
+  UIScreen* mainScreen = [UIScreen mainScreen];

[Nico, 2012/08/23 19:31:28]

optional nit: since mainScreen means something different on ios and osx, maybe
it's less confusing to the reader if you say [[UIScreen screens]
objectAtIndex:0].

[blundell, 2012/08/30 09:18:51]

Done.

+  gfx::Display display(0, gfx::Rect(mainScreen.bounds));
+  return display;
+}
+
+// static
+int Screen::GetNumDisplays() {
+#if TARGET_IPHONE_SIMULATOR
+  // Looks like UIScreens seems to lie on the simulator at times.

[stuartmorgan, 2012/08/23 19:20:19]

// UIScreen does not reliably return correct results on the simulator.

[blundell, 2012/08/30 09:18:51]

Done.

+  return 1;
+#else
+  return [[UIScreen screens] count];
+#endif
+}
+
+}  // namespace gfx