Generalize ExtensionIconSet to store icon paths for custom size sets

chrome/common/extensions/manifest_tests/extension_manifests_icon_unittest.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/extensions/manifest_tests/extension_manifest_test.h"
 
 #include "chrome/common/extensions/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST_F(ExtensionManifestTest, NormalizeIconPaths) {
   scoped_refptr<extensions::Extension> extension(
       LoadAndExpectSuccess("normalize_icon_paths.json"));
   EXPECT_EQ("16.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_BITTY, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("48.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_MEDIUM,
       ExtensionIconSet::MATCH_EXACTLY));
 }
 
 TEST_F(ExtensionManifestTest, InvalidIconSizes) {
   scoped_refptr<extensions::Extension> extension(
       LoadAndExpectSuccess("init_ignored_icon_size.json"));
-  EXPECT_EQ("", extension->icons().Get(
-      static_cast<ExtensionIconSet::Icons>(300),
-      ExtensionIconSet::MATCH_EXACTLY));
+  EXPECT_EQ("",
+            extension->icons().Get(300, ExtensionIconSet::MATCH_EXACTLY));
 }
 
 TEST_F(ExtensionManifestTest, ValidIconSizes) {
   scoped_refptr<extensions::Extension> extension(
       LoadAndExpectSuccess("init_valid_icon_size.json"));
   EXPECT_EQ("16.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_BITTY, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("24.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_SMALLISH,
       ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("32.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_SMALL, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("48.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_MEDIUM,
       ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("128.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_LARGE, ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("256.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_EXTRA_LARGE,
       ExtensionIconSet::MATCH_EXACTLY));
   EXPECT_EQ("512.png", extension->icons().Get(
       ExtensionIconSet::EXTENSION_ICON_GIGANTOR,
       ExtensionIconSet::MATCH_EXACTLY));
 }