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

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller_unittest.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/cocoa/constrained_window/constrained_window_sheet_controller.h"
 
 #include <stddef.h>
 
+#include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
 #import "testing/gtest_mac.h"
 
 namespace {
 
 const int kSystemSheetReturnCode = 77;
 
 }  // namespace
@@ skipping 129 matching lines @@
 
     [controller hideSheet];
     CustomConstrainedWindowSheet* sheet =
         [sheets_ objectAtIndex:[tab_views_ indexOfObject:active_tab_view_]];
     EXPECT_TRUE(sheet);
     [controller showSheet:sheet forParentView:active_tab_view_];
   }
 
   NSRect GetViewFrameInScreenCoordinates(NSView* view) {
     NSRect rect = [view convertRect:[view bounds] toView:nil];
-    rect.origin = [[view window] convertBaseToScreen:rect.origin];
+    rect = [[view window] convertRectToScreen:rect];
     return rect;
   }
 
   void VerifySheetXPosition(NSRect sheet_frame, NSView* parent_view) {
     NSRect parent_frame = GetViewFrameInScreenCoordinates(parent_view);
     CGFloat expected_x = NSMinX(parent_frame) +
         (NSWidth(parent_frame) - NSWidth(sheet_frame)) / 2.0;
     EXPECT_EQ(expected_x, NSMinX(sheet_frame));
   }
 
@@ skipping 137 matching lines @@
   [system_sheet setAlert:alert];
 
   EXPECT_FALSE([[alert window] isVisible]);
   [controller_ showSheet:system_sheet forParentView:active_tab_view_];
   EXPECT_TRUE([[alert window] isVisible]);
 
   [controller_ closeSheet:system_sheet];
   EXPECT_FALSE([[alert window] isVisible]);
   EXPECT_EQ(kSystemSheetReturnCode, [system_sheet returnCode]);
 }