Collect UMA statistics on which chrome://flags lead to chrome restart on ChromeOS.

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 "base/prefs/pref_registry_simple.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/about_flags.h"
@@ skipping 224 matching lines @@
 
 TEST_F(AboutFlagsTest, CompareSwitchesToCurrentCommandLine) {
   SetExperimentEnabled(&flags_storage_, kFlags1, true);
 
   CommandLine command_line(CommandLine::NO_PROGRAM);
   command_line.AppendSwitch("foo");
 
   CommandLine new_command_line(CommandLine::NO_PROGRAM);
   ConvertFlagsToSwitches(&flags_storage_, &new_command_line, kAddSentinels);
 
-  EXPECT_FALSE(AreSwitchesIdenticalToCurrentCommandLine(new_command_line,
-                                                        command_line));
+  EXPECT_FALSE(AreSwitchesIdenticalToCurrentCommandLine(
+      new_command_line, command_line, NULL));
 
   ConvertFlagsToSwitches(&flags_storage_, &command_line, kAddSentinels);
 
-  EXPECT_TRUE(AreSwitchesIdenticalToCurrentCommandLine(new_command_line,
-                                                       command_line));
+  EXPECT_TRUE(AreSwitchesIdenticalToCurrentCommandLine(
+      new_command_line, command_line, NULL));
 
   // Now both have flags but different.
   SetExperimentEnabled(&flags_storage_, kFlags1, false);
   SetExperimentEnabled(&flags_storage_, kFlags2, true);
 
   CommandLine another_command_line(CommandLine::NO_PROGRAM);
   ConvertFlagsToSwitches(&flags_storage_, &another_command_line, kAddSentinels);
 
-  EXPECT_FALSE(AreSwitchesIdenticalToCurrentCommandLine(new_command_line,
-                                                        another_command_line));
+  EXPECT_FALSE(AreSwitchesIdenticalToCurrentCommandLine(
+      new_command_line, another_command_line, NULL));
 }
 
 TEST_F(AboutFlagsTest, RemoveFlagSwitches) {
   std::map<std::string, CommandLine::StringType> switch_list;
   switch_list[kSwitch1] = CommandLine::StringType();
   switch_list[switches::kFlagSwitchesBegin] = CommandLine::StringType();
   switch_list[switches::kFlagSwitchesEnd] = CommandLine::StringType();
   switch_list["foo"] = CommandLine::StringType();
 
   SetExperimentEnabled(&flags_storage_, kFlags1, true);
@@ skipping 186 matching lines @@
   testing::SetExperiments(NULL, 0);
   size_t count;
   const Experiment* experiments = testing::GetExperiments(&count);
     for (size_t i = 0; i < count; ++i) {
     std::string name = experiments->internal_name;
     EXPECT_EQ(std::string::npos, name.find(testing::kMultiSeparator)) << i;
   }
 }
 
 }  // namespace about_flags