Use dinosaur icon on "you are offline" error page.

chrome/common/localized_error.cc

 // 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.
 
 #include "chrome/common/localized_error.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 511 matching lines @@
 
   string16 failed_url_string(UTF8ToUTF16(failed_url.spec()));
   // URLs are always LTR.
   if (rtl)
     base::i18n::WrapStringWithLTRFormatting(&failed_url_string);
   error_strings->SetString("title",
       l10n_util::GetStringFUTF16(options.title_resource_id, failed_url_string));
   error_strings->SetString("heading",
       l10n_util::GetStringUTF16(options.heading_resource_id));
 
+  std::string icon_class = (error_code == net::ERR_INTERNET_DISCONNECTED &&
+                            error_domain == net::kErrorDomain)
+                               ? "icon-offline"
+                               : "icon-generic";
+  error_strings->SetString("iconClass", icon_class);
+
   base::DictionaryValue* summary = new base::DictionaryValue;
   summary->SetString("msg",
       l10n_util::GetStringUTF16(options.summary_resource_id));
   // TODO(tc): We want the unicode url and host here since they're being
   //           displayed.
   summary->SetString("failedUrl", failed_url_string);
   summary->SetString("hostName", failed_url.host());
   summary->SetString("productName",
                      l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
 
@@ skipping 259 matching lines @@
 #if defined(OS_CHROMEOS)
   GURL learn_more_url(kAppWarningLearnMoreUrl);
   base::DictionaryValue* suggest_learn_more = new base::DictionaryValue();
   suggest_learn_more->SetString("msg",
                                 l10n_util::GetStringUTF16(
                                     IDS_ERRORPAGES_SUGGESTION_LEARNMORE_BODY));
   suggest_learn_more->SetString("learnMoreUrl", learn_more_url.spec());
   error_strings->Set("suggestionsLearnMore", suggest_learn_more);
 #endif  // defined(OS_CHROMEOS)
 }