Change panel drag related methods to use mouse location in screen coordinates.

chrome/browser/ui/panels/panel_utils_cocoa.mm

+// Copyright (c) 2012 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 "chrome/browser/ui/panels/panel_utils_cocoa.h"
+
+namespace cocoa_utils {
+
+NSRect ConvertRectToCocoaCoordinates(const gfx::Rect& bounds) {
+  // Flip coordinates based on the primary screen.
+  NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
+
+  return NSMakeRect(
+      bounds.x(), NSHeight([screen frame]) - bounds.height() - bounds.y(),
+      bounds.width(), bounds.height());
+}
+
+NSPoint ConvertPointToCocoaCoordinates(const gfx::Point& point) {
+  // Flip coordinates based on the primary screen.
+  NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
+
+  return NSMakePoint(point.x(), NSHeight([screen frame]) - point.y());
+}
+
+gfx::Point ConvertPointFromCocoaCoordinates(NSPoint point) {
+  // Flip coordinates based on the primary screen.
+  NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
+
+  return gfx::Point(point.x, NSHeight([screen frame]) - point.y);
+}
+
+}  // namespace cocoa_utils