-Wuninitialized fixes

chrome/browser/ui/cocoa/about_window_controller.mm

 // Copyright (c) 2011 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/about_window_controller.h"
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 504 matching lines @@
       break;
 
     case kAutoupdatePromoting:
 #if 1
       // TODO(mark): See the TODO in -adjustUpdateUIVisibility for an
       // explanation of why nothing can be done here at the moment.  When
       // KSRegistration handles promotion asynchronously, this dummy block can
       // be replaced with the #else block.  For now, just leave the messaging
       // alone.  http://b/2290009.
       updateMessage = false;
+      message = nil;  // clang (no pr)
 #else
       // The visibility may be changing.
       [self adjustUpdateUIVisibility];
 
       // This is not a terminal state, and kAutoupdatePromoted or
       // kAutoupdatePromoteFailed will follow.  Use the throbber and
       // "checking" message so that it looks like something's happening.
       throbber = true;
       message = l10n_util::GetNSStringWithFixup(IDS_UPGRADE_CHECK_STARTED);
 #endif
@@ skipping 220 matching lines @@
   NSRange string_range = NSMakeRange(0, [legal_block length]);
   [legal_block addAttribute:NSFontAttributeName
                       value:[NSFont labelFontOfSize:11]
                       range:string_range];
 
   [legal_block endEditing];
   return legal_block;
 }
 
 @end  // @implementation AboutWindowController