Make some updates to extension iconography.

chrome/browser/ui/webui/extensions/extension_icon_source.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/browser/ui/webui/extensions/extension_icon_source.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 60 matching lines @@
   scoped_refptr<const Extension> extension;
   bool grayscale;
   int size;
   ExtensionIconSet::MatchType match;
 };
 
 // static
 GURL ExtensionIconSource::GetIconURL(const Extension* extension,
                                      int icon_size,
                                      ExtensionIconSet::MatchType match,
-                                     bool grayscale,
-                                     bool* exists) {
-  if (exists) {
-    *exists =
-        IconsInfo::GetIconURL(extension, icon_size, match) != GURL::EmptyGURL();
-  }
-
+                                     bool grayscale) {
   GURL icon_url(base::StringPrintf("%s%s/%d/%d%s",
                                    chrome::kChromeUIExtensionIconURL,
                                    extension->id().c_str(),
                                    icon_size,
                                    match,
                                    grayscale ? "?grayscale=true" : ""));
   CHECK(icon_url.is_valid());
   return icon_url;
 }
 
@@ skipping 237 matching lines @@
 ExtensionIconSource::ExtensionIconRequest* ExtensionIconSource::GetData(
     int request_id) {
   return request_map_[request_id].get();
 }
 
 void ExtensionIconSource::ClearData(int request_id) {
   request_map_.erase(request_id);
 }
 
 }  // namespace extensions