Compact Navigation prototype

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
===================================================================
--- chrome/browser/ui/browser.cc	(revision 84869)
+++ chrome/browser/ui/browser.cc	(working copy)
@@ -264,12 +264,22 @@
   encoding_auto_detect_.Init(prefs::kWebKitUsesUniversalDetector,
                              profile_->GetPrefs(), NULL);
   use_vertical_tabs_.Init(prefs::kUseVerticalTabs, profile_->GetPrefs(), this);
+  use_compact_navigation_bar_.Init(prefs::kUseCompactNavigationBar,
+                                   profile_->GetPrefs(),
+                                   this);
 
   if (!TabMenuModel::AreVerticalTabsEnabled()) {
     // If vertical tabs aren't enabled, explicitly turn them off. Otherwise we
     // might show vertical tabs but not show an option to turn them off.
     use_vertical_tabs_.SetValue(false);
   }
+  if (!TabMenuModel::IsCompactNavigationModeEnabled()) {
+    // If the compact navigation bar isn't enabled, explicitly turn it off.
+    // Otherwise we might show the compact navigation bar but not show an option
+    // to turn it off.
+    use_compact_navigation_bar_.SetValue(false);
+  }
+
   UpdateTabStripModelInsertionPolicy();
 
   tab_restore_service_ = TabRestoreServiceFactory::GetForProfile(profile);
@@ -328,6 +338,7 @@
 
   encoding_auto_detect_.Destroy();
   use_vertical_tabs_.Destroy();
+  use_compact_navigation_bar_.Destroy();
 
   if (profile_->IsOffTheRecord() &&
       !BrowserList::IsOffTheRecordSessionActive()) {
@@ -427,6 +438,11 @@
       Source<Browser>(this),
       NotificationService::NoDetails());
 
+  if (use_compact_navigation_bar_.GetValue()) {
+    // This enables the compact navigation bar host.
+    UseCompactNavigationBarChanged();
+  }
+
   // Show the First Run information bubble if we've been told to.
   PrefService* local_state = g_browser_process->local_state();
   if (!local_state)
@@ -1216,6 +1232,7 @@
   command_updater_.UpdateCommandEnabled(IDC_ABOUT, show_main_ui);
   command_updater_.UpdateCommandEnabled(IDC_SHOW_APP_MENU, show_main_ui);
   command_updater_.UpdateCommandEnabled(IDC_TOGGLE_VERTICAL_TABS, show_main_ui);
+  command_updater_.UpdateCommandEnabled(IDC_COMPACT_NAVBAR, show_main_ui);
 #if defined (ENABLE_PROFILING) && !defined(NO_TCMALLOC)
   command_updater_.UpdateCommandEnabled(IDC_PROFILING_ENABLED, show_main_ui);
 #endif
@@ -1253,6 +1270,10 @@
   window()->ToggleTabStripMode();
 }
 
+void Browser::UseCompactNavigationBarChanged() {
+  window_->ToggleUseCompactNavigationBar();
+}
+
 bool Browser::SupportsWindowFeatureImpl(WindowFeature feature,
                                         bool check_fullscreen) const {
   // On Mac, fullscreen mode has most normal things (in a slide-down panel). On
@@ -2150,6 +2171,9 @@
   prefs->RegisterBooleanPref(prefs::kUseVerticalTabs,
                              false,
                              PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kUseCompactNavigationBar,
+                             false,
+                             PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kEnableTranslate,
                              true,
                              PrefService::SYNCABLE_PREF);
@@ -2299,6 +2323,7 @@
     case IDC_FULLSCREEN:            ToggleFullscreenMode();           break;
     case IDC_EXIT:                  Exit();                           break;
     case IDC_TOGGLE_VERTICAL_TABS:  ToggleUseVerticalTabs();          break;
+    case IDC_COMPACT_NAVBAR:        ToggleUseCompactNavigationBar();  break;
 #if defined(OS_CHROMEOS)
     case IDC_SEARCH:                Search();                         break;
     case IDC_SHOW_KEYBOARD_OVERLAY: ShowKeyboardOverlay();            break;
@@ -2774,6 +2799,11 @@
   UseVerticalTabsChanged();
 }
 
+void Browser::ToggleUseCompactNavigationBar() {
+  use_compact_navigation_bar_.SetValue(!UseCompactNavigationBar());
+  UseCompactNavigationBarChanged();
+}
+
 bool Browser::LargeIconsPermitted() const {
   // We don't show the big icons in tabs for TYPE_EXTENSION_APP windows because
   // for those windows, we already have a big icon in the top-left outside any
@@ -3158,6 +3188,10 @@
   return use_vertical_tabs_.GetValue();
 }
 
+bool Browser::UseCompactNavigationBar() const {
+  return use_compact_navigation_bar_.GetValue();
+}
+
 void Browser::ContentsZoomChange(bool zoom_in) {
   ExecuteCommand(zoom_in ? IDC_ZOOM_PLUS : IDC_ZOOM_MINUS);
 }
@@ -3555,6 +3589,8 @@
       const std::string& pref_name = *Details<std::string>(details).ptr();
       if (pref_name == prefs::kUseVerticalTabs) {
         UseVerticalTabsChanged();
+      } else if (pref_name == prefs::kUseCompactNavigationBar) {
+        UseCompactNavigationBarChanged();
       } else if (pref_name == prefs::kPrintingEnabled) {
         UpdatePrintingState(GetContentRestrictionsForSelectedTab());
       } else if (pref_name == prefs::kInstantEnabled) {