Prepare chrome/ for compilation with OS X 10.7 deployment target.

chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.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.
 
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.h"
 
 #include <cmath>
 
 #include "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 185 matching lines @@
   NSRect anchor_rect_base = [controller omniboxPopupAnchorRect];
 
   // Calculate the popup's position on the screen.
   NSRect popup_frame = anchor_rect_base;
   // Size to fit the matrix and shift down by the size.
   popup_frame.size.height = matrixHeight + kPopupPaddingVertical * 2.0;
   popup_frame.size.height += [OmniboxPopupTopSeparatorView preferredHeight];
   popup_frame.size.height += [OmniboxPopupBottomSeparatorView preferredHeight];
   popup_frame.origin.y -= NSHeight(popup_frame);
   // Shift to screen coordinates.
-  popup_frame.origin =
-      [[controller window] convertBaseToScreen:popup_frame.origin];
+  popup_frame = [[controller window] convertRectToScreen:popup_frame];
 
   // Top separator.
   NSRect top_separator_frame = NSZeroRect;
   top_separator_frame.size.width = NSWidth(popup_frame);
   top_separator_frame.size.height =
       [OmniboxPopupTopSeparatorView preferredHeight];
   [top_separator_view_ setFrame:top_separator_frame];
 
   // Bottom separator.
   NSRect bottom_separator_frame = NSZeroRect;
@@ skipping 91 matching lines @@
       IDR_OMNIBOX_STAR : AutocompleteMatch::TypeToIcon(match.type);
   return OmniboxViewMac::ImageForResource(resource_id);
 }
 
 void OmniboxPopupViewMac::OpenURLForRow(size_t row,
                                         WindowOpenDisposition disposition) {
   DCHECK_LT(row, GetResult().size());
   omnibox_view_->OpenMatch(GetResult().match_at(row), disposition, GURL(),
                            base::string16(), row);
 }