Zero-sized windows are bad.

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/stl_util.h"
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
 #include "chrome/browser/instant/instant_confirm_dialog.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/cocoa/event_utils.h"
 #include "chrome/browser/ui/cocoa/image_utils.h"
 #import "chrome/browser/ui/cocoa/location_bar/omnibox_popup_view.h"
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
 #include "grit/theme_resources.h"
 #include "skia/ext/skia_utils_mac.h"
 #import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
 #import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
+#include "ui/base/cocoa/window_size_constants.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/text/text_elider.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 namespace {
 
 // The size delta between the font used for the edit and the result
 // rows.
 const int kEditFontAdjust = -1;
@@ skipping 280 matching lines @@
   }
   return nil;
 }
 
 bool OmniboxPopupViewMac::IsOpen() const {
   return popup_ != nil;
 }
 
 void OmniboxPopupViewMac::CreatePopupIfNeeded() {
   if (!popup_) {
-    popup_.reset([[NSWindow alloc] initWithContentRect:NSZeroRect
-                                             styleMask:NSBorderlessWindowMask
-                                               backing:NSBackingStoreBuffered
-                                                 defer:YES]);
+    popup_.reset(
+        [[NSWindow alloc] initWithContentRect:ui::kWindowSizeDeterminedLater
+                                    styleMask:NSBorderlessWindowMask
+                                      backing:NSBackingStoreBuffered
+                                        defer:YES]);
     [popup_ setMovableByWindowBackground:NO];
     // The window shape is determined by the content view (OmniboxPopupView).
     [popup_ setAlphaValue:1.0];
     [popup_ setOpaque:NO];
     [popup_ setBackgroundColor:[NSColor clearColor]];
     [popup_ setHasShadow:YES];
     [popup_ setLevel:NSNormalWindowLevel];
 
     scoped_nsobject<AutocompleteMatrix> matrix(
         [[AutocompleteMatrix alloc] initWithPopupView:this]);
@@ skipping 447 matching lines @@
                         bottomLeftCornerRadius:kPopupRoundingRadius
                        bottomRightCornerRadius:kPopupRoundingRadius];
 
   // Draw the matrix clipped to our border.
   gfx::ScopedNSGraphicsContextSaveGState scopedGState;
   [path addClip];
   [super drawRect:rect];
 }
 
 @end