Added prefs ui for enabling/disabling background mode on windows.

chrome/browser/views/options/advanced_contents_view.cc

Index: chrome/browser/views/options/advanced_contents_view.cc
diff --git a/chrome/browser/views/options/advanced_contents_view.cc b/chrome/browser/views/options/advanced_contents_view.cc
index ee7dfc924d8ccf65158f09b9dce38ad97784a9d2..9e84f11c8e56ba0b69467807d3bbcf2d51de1213 100644
--- a/chrome/browser/views/options/advanced_contents_view.cc
+++ b/chrome/browser/views/options/advanced_contents_view.cc
@@ -1276,6 +1276,92 @@ void TranslateSection::NotifyPrefChanged(const std::string* pref_name) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// ChromeAppsSection
+
+class ChromeAppsSection : public AdvancedSection,
+                          public views::ButtonListener,
+                          public views::LinkController {
+ public:
+  explicit ChromeAppsSection(Profile* profile);
+  virtual ~ChromeAppsSection() {}
+
+  // Overridden from views::ButtonListener:
+  virtual void ButtonPressed(views::Button* sender, const views::Event& event);
+  // Overridden from views::LinkController:
+  virtual void LinkActivated(views::Link* source, int event_flags);
+
+ protected:
+  // OptionsPageView overrides:
+  virtual void InitControlLayout();
+  virtual void NotifyPrefChanged(const std::string* pref_name);
+
+ private:
+  // Controls for this section:
+  views::Checkbox* enable_background_mode_checkbox_;
+  views::Link* learn_more_link_;
+
+  // Preferences for this section:
+  BooleanPrefMember enable_background_mode_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeAppsSection);
+};
+
+ChromeAppsSection::ChromeAppsSection(Profile* profile)
+    : enable_background_mode_checkbox_(NULL),
+      learn_more_link_(NULL),
+      AdvancedSection(profile, l10n_util::GetString(
+          IDS_OPTIONS_ADVANCED_SECTION_TITLE_CHROME_APPS)) {
+}
+
+void ChromeAppsSection::ButtonPressed(
+    views::Button* sender, const views::Event& event) {
+  DCHECK(sender == enable_background_mode_checkbox_);
+  bool enabled = enable_background_mode_checkbox_->checked();
+  UserMetricsRecordAction(enabled ?
+                          UserMetricsAction("Options_BackgroundMode_Enable") :
+                          UserMetricsAction("Options_BackgroundMode_Disable"),
+                          profile()->GetPrefs());
+  enable_background_mode_.SetValue(enabled);
+}
+
+void ChromeAppsSection::LinkActivated(views::Link* source, int event_flags) {
+  DCHECK(source == learn_more_link_);
+  Browser::Create(profile())->OpenURL(
+      GURL(l10n_util::GetString(IDS_LEARN_MORE_BACKGROUND_MODE_URL)), GURL(),
+      NEW_WINDOW, PageTransition::LINK);
+}
+
+void ChromeAppsSection::InitControlLayout() {
+  AdvancedSection::InitControlLayout();
+
+  GridLayout* layout = new GridLayout(contents_);
+  contents_->SetLayoutManager(layout);
+
+  AddIndentedColumnSet(layout, 0);
+
+  enable_background_mode_checkbox_ = new views::Checkbox(
+      l10n_util::GetString(IDS_OPTIONS_CHROME_APPS_ENABLE_BACKGROUND_MODE));
+  enable_background_mode_checkbox_->set_listener(this);
+  AddWrappingCheckboxRow(layout, enable_background_mode_checkbox_, 0, true);
+
+  // Init member pref so we can update the controls if prefs change.
+  enable_background_mode_.Init(prefs::kBackgroundModeEnabled,
+      profile()->GetPrefs(), this);
+
+  // Add our link to the help center page for this feature.
+  learn_more_link_ = new views::Link(l10n_util::GetString(IDS_LEARN_MORE));
+  learn_more_link_->SetController(this);
+  AddLeadingControl(layout, learn_more_link_, 0, false);
+}
+
+void ChromeAppsSection::NotifyPrefChanged(const std::string* pref_name) {
+  if (!pref_name || *pref_name == prefs::kBackgroundModeEnabled) {
+    enable_background_mode_checkbox_->SetChecked(
+        enable_background_mode_.GetValue());
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // AdvancedContentsView
 
 class AdvancedContentsView : public OptionsPageView {
@@ -1372,6 +1458,8 @@ void AdvancedContentsView::InitControlLayout() {
   layout->AddView(new WebContentSection(profile()));
   layout->StartRow(0, single_column_view_set_id);
   layout->AddView(new SecuritySection(profile()));
+  layout->StartRow(0, single_column_view_set_id);
+  layout->AddView(new ChromeAppsSection(profile()));
 }
 
 ////////////////////////////////////////////////////////////////////////////////