Implement an AutoLaunch experiment for Chrome for certain brand codes.

chrome/browser/ui/webui/options/browser_options_handler.cc

Index: chrome/browser/ui/webui/options/browser_options_handler.cc
===================================================================
--- chrome/browser/ui/webui/options/browser_options_handler.cc	(revision 111708)
+++ chrome/browser/ui/webui/options/browser_options_handler.cc	(working copy)
@@ -8,9 +8,11 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/singleton.h"
+#include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
+#include "chrome/browser/auto_launch_trial.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/browser_process.h"
@@ -37,6 +39,10 @@
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if defined(OS_WIN)
+#include "chrome/installer/util/auto_launch_util.h"
+#endif
+
 BrowserOptionsHandler::BrowserOptionsHandler()
     : template_url_service_(NULL), startup_custom_pages_table_model_(NULL) {
 #if !defined(OS_MACOSX)
@@ -90,6 +96,9 @@
   localized_strings->SetString("defaultBrowserUseAsDefault",
       l10n_util::GetStringFUTF16(IDS_OPTIONS_DEFAULTBROWSER_USEASDEFAULT,
           l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
+  localized_strings->SetString("autoLaunchText",
+      l10n_util::GetStringFUTF16(IDS_AUTOLAUNCH_TEXT,
+          l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
 }
 
 void BrowserOptionsHandler::RegisterMessages() {
@@ -126,6 +135,11 @@
   web_ui_->RegisterMessageCallback("getInstantFieldTrialStatus",
       base::Bind(&BrowserOptionsHandler::GetInstantFieldTrialStatus,
                  base::Unretained(this)));
+  if (auto_launch_trial::IsInAutoLaunchGroup()) {
+    web_ui_->RegisterMessageCallback("toggleAutoLaunch",
+        base::Bind(&BrowserOptionsHandler::ToggleAutoLaunch,
+                   base::Unretained(this)));
+  }
 }
 
 void BrowserOptionsHandler::Initialize() {
@@ -152,6 +166,14 @@
   UpdateSearchEngines();
 
   autocomplete_controller_.reset(new AutocompleteController(profile, this));
+
+#if defined(OS_WIN)
+  if (auto_launch_trial::IsInAutoLaunchGroup()) {
+    base::FundamentalValue enabled(auto_launch_util::WillLaunchAtLogin());
+    web_ui_->CallJavascriptFunction("BrowserOptions.updateAutoLaunchState",
+                                    enabled);
+  }
+#endif
 }
 
 void BrowserOptionsHandler::UpdateDefaultBrowserState() {
@@ -461,6 +483,26 @@
   InstantController::Disable(Profile::FromWebUI(web_ui_));
 }
 
+void BrowserOptionsHandler::ToggleAutoLaunch(const ListValue* args) {
+#if defined(OS_WIN)
+  if (!auto_launch_trial::IsInAutoLaunchGroup())
+    return;
+
+  bool enable;
+  CHECK_EQ(args->GetSize(), 1U);
+  CHECK(args->GetBoolean(0, &enable));
+
+  // Make sure we keep track of how many disable and how many enable.

[grt (UTC plus 2), 2011/12/01 04:45:02]

this is almost duplicate code.  could it be shared better?

+  auto_launch_trial::UpdateToggleAutoLaunchMetric(enable);
+
+  FilePath chrome_exe;

[grt (UTC plus 2), 2011/12/01 04:45:02]

chrome_exe -> chrome_dir, or somesuch

+  if (!PathService::Get(base::DIR_EXE, &chrome_exe))

[stuartmorgan, 2011/12/01 10:11:44]

Seems a bit odd to me that this code lives here and not in a helper; it's not
WebUI-specific, and if we have other UI for this, it'll be duplicated.

+    NOTREACHED();
+
+  auto_launch_util::SetWillLaunchAtLogin(enable, chrome_exe);

[grt (UTC plus 2), 2011/12/01 04:45:02]

this will touch the registry.  is IO allowed from whatever thread this is
running in (UI?).

+#endif  // OS_WIN
+}
+
 void BrowserOptionsHandler::GetInstantFieldTrialStatus(const ListValue* args) {
   Profile* profile = Profile::FromWebUI(web_ui_);
   base::FundamentalValue enabled(