Zero-sized windows are bad.

chrome/browser/ui/cocoa/extensions/extension_popup_controller.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/extensions/extension_popup_controller.h"
 
 #include <algorithm>
 
 #include "chrome/browser/debugger/devtools_window.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #import "chrome/browser/ui/cocoa/browser_window_cocoa.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_view_mac.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
+#include "ui/base/cocoa/window_size_constants.h"
 
 using content::RenderViewHost;
 
 namespace {
 // The duration for any animations that might be invoked by this controller.
 const NSTimeInterval kAnimationDuration = 0.2;
 
 // There should only be one extension popup showing at one time. Keep a
 // reference to it here.
 static ExtensionPopupController* gPopup;
@@ skipping 91 matching lines @@
 
 @implementation ExtensionPopupController
 
 - (id)initWithHost:(ExtensionHost*)host
       parentWindow:(NSWindow*)parentWindow
         anchoredAt:(NSPoint)anchoredAt
      arrowLocation:(info_bubble::BubbleArrowLocation)arrowLocation
            devMode:(BOOL)devMode {
   scoped_nsobject<InfoBubbleWindow> window(
       [[InfoBubbleWindow alloc]
-          initWithContentRect:NSZeroRect
+          initWithContentRect:ui::kWindowSizeDeterminedLater
                     styleMask:NSBorderlessWindowMask
                       backing:NSBackingStoreBuffered
                         defer:YES]);
   if (!window.get())
     return nil;
   anchoredAt = [parentWindow convertBaseToScreen:anchoredAt];
   if ((self = [super initWithWindow:window
                        parentWindow:parentWindow
                          anchoredAt:anchoredAt])) {
     host_.reset(host);
@@ skipping 225 matching lines @@
   return minSize;
 }
 
 // Private (TestingAPI)
 + (NSSize)maxPopupSize {
   NSSize maxSize = {ExtensionViewMac::kMaxWidth, ExtensionViewMac::kMaxHeight};
   return maxSize;
 }
 
 @end