Prepare ui/ module for compilation with OS X 10.7 deployment target.

ui/views/cocoa/tooltip_manager_mac.mm

 // Copyright 2015 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 "ui/views/cocoa/tooltip_manager_mac.h"
 
+#include "ui/base/cocoa/cocoa_base_utils.h"
 #include "ui/gfx/font_list.h"
 #import "ui/gfx/mac/coordinate_conversion.h"
 #import "ui/views/cocoa/bridged_content_view.h"
 #import "ui/views/cocoa/bridged_native_widget.h"
 
 namespace {
 
 // Max visual tooltip width in DIPs. Beyond this, Cocoa will wrap text.
 const int kTooltipMaxWidthPixels = 250;
 
@@ skipping 15 matching lines @@
 const gfx::FontList& TooltipManagerMac::GetFontList() const {
   CR_DEFINE_STATIC_LOCAL(gfx::FontList, font_list,
                          (gfx::Font([NSFont toolTipsFontOfSize:0])));
   return font_list;
 }
 
 void TooltipManagerMac::UpdateTooltip() {
   NSWindow* window = widget_->ns_window();
   BridgedContentView* view = widget_->ns_view();
 
-  NSPoint nspoint = [window convertScreenToBase:[NSEvent mouseLocation]];
+  NSPoint nspoint =
+      ui::ConvertPointFromScreenToWindow(window, [NSEvent mouseLocation]);
   // Note: flip in the view's frame, which matches the window's contentRect.
   gfx::Point point(nspoint.x, NSHeight([view frame]) - nspoint.y);
   [view updateTooltipIfRequiredAt:point];
 }
 
 void TooltipManagerMac::TooltipTextChanged(View* view) {
   // The intensive part is View::GetTooltipHandlerForPoint(), which will be done
   // in [BridgedContentView updateTooltipIfRequiredAt:]. Don't do it here as
   // well.
   UpdateTooltip();
 }
 
 }  // namespace views