Allow overriding variation parameter via chrome://flags.

chrome/browser/about_flags_unittest.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 "chrome/browser/about_flags.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
@@ skipping 150 matching lines @@
 
 std::string FilePathStringTypeToString(const base::FilePath::StringType& path) {
 #if defined(OS_WIN)
   return base::UTF16ToUTF8(path);
 #else
   return path;
 #endif
 }
 
 // Get all associated switches corresponding to defined about_flags.cc entries.
-// Does not include information about FEATURE_VALUE entries.
+// Does not include information about FEATURE_VALUE or
+// FEATURE_WITH_VARIATIOSN_VALUE entries.
 std::set<std::string> GetAllSwitchesForTesting() {
   std::set<std::string> result;
 
   size_t num_entries = 0;
   const flags_ui::FeatureEntry* entries =
       testing::GetFeatureEntries(&num_entries);
 
   for (size_t i = 0; i < num_entries; ++i) {
     const flags_ui::FeatureEntry& entry = entries[i];
     switch (entry.type) {
       case flags_ui::FeatureEntry::SINGLE_VALUE:
       case flags_ui::FeatureEntry::SINGLE_DISABLE_VALUE:
         result.insert(entry.command_line_switch);
         break;
       case flags_ui::FeatureEntry::MULTI_VALUE:
-        for (int j = 0; j < entry.num_choices; ++j) {
-          result.insert(entry.choices[j].command_line_switch);
+        for (int j = 0; j < entry.num_options; ++j) {
+          result.insert(entry.ChoiceForOption(j).command_line_switch);
         }
         break;
       case flags_ui::FeatureEntry::ENABLE_DISABLE_VALUE:
         result.insert(entry.command_line_switch);
         result.insert(entry.disable_command_line_switch);
         break;
       case flags_ui::FeatureEntry::FEATURE_VALUE:
+      case flags_ui::FeatureEntry::FEATURE_WITH_VARIATIONS_VALUE:
         break;
     }
   }
   return result;
 }
 
 }  // anonymous namespace
 
 // Makes sure there are no separators in any of the entry names.
 TEST(AboutFlagsTest, NoSeparators) {
@@ skipping 95 matching lines @@
     EXPECT_TRUE(enum_entry != histograms_xml_switches_ids.end() &&
                 enum_entry->first == flag)
         << "histograms.xml enum LoginCustomFlags doesn't contain switch '"
         << flag << "' (value=" << uma_id
         << " expected). Consider adding entry:\n"
         << "  " << GetHistogramEnumEntryText(flag, uma_id);
   }
 }
 
 }  // namespace about_flags