Fix NSString conversions to treat a null NSString as a string of length 0, in...

chrome/browser/cocoa/bug_report_window_controller_unittest.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/ref_counted.h"
 #import "chrome/browser/cocoa/bug_report_window_controller.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/browser/renderer_host/test/test_render_view_host.h"
@@ skipping 36 matching lines @@
 
   delete tabContents;
   [controller release];
 }
 
 TEST_F(BugReportWindowControllerUnittest, ReportBugWithNoWindowOpen) {
   BugReportWindowController* controller = [[BugReportWindowController alloc]
       initWithTabContents:NULL
                   profile:profile_.get()];
 
-  // Make sure that no page title or URL are recorded.
-  EXPECT_TRUE([[controller pageURL] isEqualToString:@""]);
-  EXPECT_TRUE([[controller pageTitle] isEqualToString:@""]);
+  // Make sure that no page title or URL are recorded. Note that IB reports
+  // empty textfields as NULL values.
+  EXPECT_FALSE([controller pageURL]);
+  EXPECT_FALSE([controller pageTitle]);
 
   // When we call "report bug" with empty tab contents, only menu options
   // that don't refer to a specific page should be available, and the send
   // screenshot option should be turned off.
   EXPECT_EQ([[controller bugTypeList] count], 4U);
   EXPECT_FALSE([controller sendScreenshot]);
 
   [controller release];
 }
 
 }  // namespace