Give Chrome Web Store app an icon in its manifest file.

chrome/renderer/extensions/resource_request_policy.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/renderer/extensions/resource_request_policy.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 52 matching lines @@
     // - extensions requesting their own resources (frame_url check is for
     //     images, page_url check is for iframes)
     bool is_own_resource = frame_url.GetOrigin() == extension->url() ||
         page_url.GetOrigin() == extension->url();
     // - devtools (chrome-extension:// URLs are loaded into frames of devtools
     //     to support the devtools extension APIs)
     bool is_dev_tools = page_url.SchemeIs(chrome::kChromeDevToolsScheme) &&
         !extension->devtools_url().is_empty();
     bool transition_allowed =
         !content::PageTransitionIsWebTriggerable(transition_type);
+    // - unreachable web page error page (to allow showing the icon of the
+    //   unreachable app on this page)
+    bool is_error_page = frame_url == GURL(content::kUnreachableWebDataURL);
 
     if (!is_empty_origin && !is_own_resource &&
-        !is_dev_tools && !transition_allowed) {
+        !is_dev_tools && !transition_allowed && !is_error_page) {
       std::string message = base::StringPrintf(
           "Denying load of %s. Resources must be listed in the "
           "web_accessible_resources manifest key in order to be loaded by "
           "pages outside the extension.",
           resource_url.spec().c_str());
       frame->addMessageToConsole(
           WebKit::WebConsoleMessage(WebKit::WebConsoleMessage::LevelError,
                                     WebKit::WebString::fromUTF8(message)));
       return false;
     }
@@ skipping 21 matching lines @@
     return false;
   }
 
   return true;
 }
 
 ResourceRequestPolicy::ResourceRequestPolicy() {
 }
 
 }  // namespace extensions