Load the http auth dialog from the main bundle....

chrome/browser/login_prompt_mac.mm

 // Copyright (c) 2009 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/login_prompt.h"
 #import "chrome/browser/login_prompt_mac.h"
 
 #include "app/l10n_util.h"
 #include "base/mac_util.h"
 #include "base/message_loop.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/cocoa/constrained_window_mac.h"
 #include "chrome/browser/login_model.h"
 #include "chrome/browser/password_manager/password_manager.h"
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/common/notification_service.h"
 #include "grit/generated_resources.h"
 #include "net/url_request/url_request.h"
+#include "third_party/GTM/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 
 using webkit_glue::PasswordForm;
 
 // ----------------------------------------------------------------------------
 // LoginHandlerMac
 
 // This class simply forwards the authentication from the LoginView (on
 // the UI thread) to the URLRequest (on the I/O thread).
 // This class uses ref counting to ensure that it lives until all InvokeLaters
 // have been called.
@@ skipping 50 matching lines @@
     DCHECK(MessageLoop::current() == ui_loop_);
 
     // Load nib here instead of in constructor.
     sheet_controller_ = [[[LoginHandlerSheet alloc]
         initWithLoginHandler:this] autorelease];
     init([sheet_controller_ window], sheet_controller_,
           @selector(sheetDidEnd:returnCode:contextInfo:));
 
     SetModel(manager);
 
+    [sheet_controller_ setExplanation:base::SysWideToNSString(explanation)];
+
     // Scary thread safety note: This can potentially be called *after* SetAuth
     // or CancelAuth (say, if the request was cancelled before the UI thread got
     // control).  However, that's OK since any UI interaction in those functions
     // will occur via an InvokeLater on the UI thread, which is guaranteed
     // to happen after this is called (since this was InvokeLater'd first).
     dialog_ = GetTabContentsForLogin()->CreateConstrainedDialog(this);
 
     SendNotifications();
   }
 
@@ skipping 203 matching lines @@
 LoginHandler* LoginHandler::Create(URLRequest* request, MessageLoop* ui_loop) {
   return new LoginHandlerMac(request, ui_loop);
 }
 
 // ----------------------------------------------------------------------------
 // LoginHandlerSheet
 
 @implementation LoginHandlerSheet
 
 - (id)initWithLoginHandler:(LoginHandlerMac*)handler {
- if ((self = [super initWithWindowNibName:@"HttpAuthLoginSheet"
-                                    owner:self])) {
+  NSString* nibPath =
+      [mac_util::MainAppBundle() pathForResource:@"HttpAuthLoginSheet"
+                                          ofType:@"nib"];
+  if ((self = [super initWithWindowNibPath:nibPath
+                                     owner:self])) {
     handler_ = handler;
   }
   return self;
 }
 
 - (IBAction)loginPressed:(id)sender {
   using base::SysNSStringToWide;
   [NSApp endSheet:[self window]];
   handler_->OnLoginPressed(SysNSStringToWide([nameField_ stringValue]),
                            SysNSStringToWide([passwordField_ stringValue]));
@@ skipping 12 matching lines @@
 }
 
 - (void)autofillLogin:(NSString*)login password:(NSString*)password {
   if ([[nameField_ stringValue] length] == 0) {
     [nameField_ setStringValue:login];
     [passwordField_ setStringValue:password];
     [nameField_ selectText:self];
   }
 }
 
+- (void)setExplanation:(NSString*)explanation {
+  // Put in the text

[pink (ping after 24hrs), 2009/09/14 19:08:12]

period after sentence. applies to 2 comments below as well

+  [explanationField_ setStringValue:explanation];
+
+  // Resize the TextField
+  CGFloat explanationShift =
+      [GTMUILocalizerAndLayoutTweaker
+       sizeToFitFixedWidthTextField:explanationField_];
+
+  // Resize the window (no shifting needed due to window layout)
+  NSWindow* window = [self window];
+  [[window contentView] setAutoresizesSubviews:NO];
+  NSRect rect = [window frame];
+  rect.size.height = rect.size.height + explanationShift;

[Nico, 2009/09/14 19:34:56]

+=

+  [window setFrame:rect display:NO];
+  [[window contentView] setAutoresizesSubviews:YES];
+}
+
 @end