MacViews: Implement Set/Get*Bounds for NativeWidgetMac

ui/gfx/mac/coordinate_conversion.mm

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ui/gfx/mac/coordinate_conversion.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "ui/gfx/geometry/rect.h"
+
+namespace gfx {
+
+namespace {
+
+// The height of the primary display, which OSX defines as the monitor with the
+// menubar. This is always at index 0.
+CGFloat PrimaryDisplayHeight() {
+  return NSMaxY([[[NSScreen screens] objectAtIndex:0] frame]);
+}
+
+}  // namespace
+
+NSRect ScreenRectToNSRect(const gfx::Rect& rect) {
+  return NSMakeRect(rect.x(),
+                    PrimaryDisplayHeight() - rect.y() - rect.height(),
+                    rect.width(),
+                    rect.height());
+}
+
+gfx::Rect ScreenRectFromNSRect(const NSRect& rect) {
+  return gfx::Rect(rect.origin.x,
+                   PrimaryDisplayHeight() - rect.origin.y - rect.size.height,
+                   rect.size.width,
+                   rect.size.height);
+}
+
+}  // namespace gfx