Revert 72381 - Fix size_t in printf.

chrome/browser/extensions/extension_omnibox_apitest.cc

 // 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.
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_edit_view.h"
@@ skipping 14 matching lines @@
 // http://crbug.com/52929
 #if defined(OS_CHROMEOS)
 #define MAYBE_Basic FLAKY_Basic
 #else
 #define MAYBE_Basic Basic
 #endif
 
 namespace {
 
 string16 AutocompleteResultAsString(const AutocompleteResult& result) {
-  std::string output(base::StringPrintf("{%z} ", result.size()));
+  std::string output(base::StringPrintf("{%lu} ", result.size()));
   for (size_t i = 0; i < result.size(); ++i) {
     AutocompleteMatch match = result.match_at(i);
     std::string provider_name = match.provider->name();
     output.append(base::StringPrintf("[\"%s\" by \"%s\"] ",
                                      UTF16ToUTF8(match.contents).c_str(),
                                      provider_name.c_str()));
   }
   return UTF8ToUTF16(output);
 }
 
@@ skipping 130 matching lines @@
   }
 
   {
     ResultCatcher catcher;
     autocomplete_controller->Start(ASCIIToUTF16("keyword command"), string16(),
                                    true, false, true, false);
     location_bar->AcceptInput();
     EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
   }
 }