Fix Hiding Issue with Certificate Viewer Mac

chrome/browser/ui/cocoa/certificate_viewer_mac_browsertest.mm

 // Copyright (c) 2013 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/certificate_viewer.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/cocoa/certificate_viewer_mac.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ skipping 53 matching lines @@
 
   content::RunAllPendingInMessageLoop();
 
   NSWindow* sheetWindow = [[viewer overlayWindow] attachedSheet];
   NSRect sheetFrame = [sheetWindow frame];
   EXPECT_EQ(1.0, [sheetWindow alphaValue]);
 
   // Switch to another tab and verify that the sheet is hidden.
   AddBlankTabAndShow(browser());
   EXPECT_EQ(0.0, [sheetWindow alphaValue]);
-  EXPECT_NSEQ(sheetFrame, [sheetWindow frame]);
+  EXPECT_NSEQ(ui::kWindowSizeDeterminedLater, [sheetWindow frame]);
 
   // Switch back and verify that the sheet is shown.
   chrome::SelectNumberedTab(browser(), 0);
   EXPECT_EQ(1.0, [sheetWindow alphaValue]);
   EXPECT_NSEQ(sheetFrame, [sheetWindow frame]);
 }