Revert r42156, r42157, r42160. Allow dynamic switching in and out of sidetabs mode.

Reliability bot and Linux CrOS browser_tests all had crashes in ~TabStrip.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/1141005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42176 0039d316-1c4b-4281-b951-d872f2087c98

34 files changed, 59 insertions, 341 deletions

diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 7d81442..02486fd 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4344,9 +4344,6 @@ Keep your key file in a safe place. You will need it to create new versions of y
         <message name="IDS_TAB_CXMENU_BOOKMARK_ALL_TABS" desc="In Title Case: The label of the tab context menu item for creating a bookmark folder containing an entry for each open tab.">
           Bookmark all tabs...
         </message>
-        <message name="IDS_TAB_CXMENU_USE_VERTICAL_TABS" desc="Use the vertical tab strip">
-          Use side tabs
-        </message>
       </if>
       <if expr="pp_ifdef('use_titlecase')">
         <message name="IDS_TAB_CXMENU_NEWTAB" desc="In Title Case: The label of the 'New Tab' Tab context menu item.">
diff --git a/chrome/browser/browser.cc b/chrome/browser/browser.cc
index 3b8346d..f2779af 100644
--- a/chrome/browser/browser.cc
+++ b/chrome/browser/browser.cc
@@ -190,7 +190,6 @@ Browser::Browser(Type type, Profile* profile)
 
   encoding_auto_detect_.Init(prefs::kWebKitUsesUniversalDetector,
                              profile_->GetPrefs(), NULL);
-  use_vertical_tabs_.Init(prefs::kUseVerticalTabs, profile_->GetPrefs(), this);
 }
 
 Browser::~Browser() {
@@ -1567,7 +1566,7 @@ void Browser::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kWebAppCreateOnDesktop, true);
   prefs->RegisterBooleanPref(prefs::kWebAppCreateInAppsMenu, true);
   prefs->RegisterBooleanPref(prefs::kWebAppCreateInQuickLaunchBar, true);
-  prefs->RegisterBooleanPref(prefs::kUseVerticalTabs, false);
+  prefs->RegisterBooleanPref(prefs::kUseVerticalTabs, true);
   prefs->RegisterBooleanPref(prefs::kEnableTranslate, true);
 }
 
@@ -1995,15 +1994,6 @@ void Browser::BookmarkAllTabs() {
                        BookmarkEditor::SHOW_TREE, NULL);
 }
 
-bool Browser::UseVerticalTabs() const {
-  return use_vertical_tabs_.GetValue();
-}
-
-void Browser::ToggleUseVerticalTabs() {
-  use_vertical_tabs_.SetValue(!UseVerticalTabs());
-  window()->ToggleTabStripMode();
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabStripModelObserver implementation:
 
diff --git a/chrome/browser/browser.h b/chrome/browser/browser.h
index e98966f..51470f7 100644
--- a/chrome/browser/browser.h
+++ b/chrome/browser/browser.h
@@ -604,8 +604,6 @@ class Browser : public TabStripModelDelegate,
   virtual bool CanCloseContentsAt(int index);
   virtual bool CanBookmarkAllTabs() const;
   virtual void BookmarkAllTabs();
-  virtual bool UseVerticalTabs() const;
-  virtual void ToggleUseVerticalTabs();
 
   // Overridden from TabStripModelObserver:
   virtual void TabInsertedAt(TabContents* contents,
@@ -946,9 +944,6 @@ class Browser : public TabStripModelDelegate,
   // from a TabContents. Currently, only one pending action is allowed.
   WebAppAction pending_web_app_action_;
 
-  // Tracks the display mode of the tabstrip.
-  mutable BooleanPrefMember use_vertical_tabs_;
-
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
diff --git a/chrome/browser/browser_window.h b/chrome/browser/browser_window.h
index 1d3501a..a4ff572 100644
--- a/chrome/browser/browser_window.h
+++ b/chrome/browser/browser_window.h
@@ -310,9 +310,6 @@ class BrowserWindow {
   virtual void Copy() = 0;
   virtual void Paste() = 0;
 
-  // Switches between available tabstrip display modes.
-  virtual void ToggleTabStripMode() = 0;
-
   // Construct a BrowserWindow implementation for the specified |browser|.
   static BrowserWindow* CreateBrowserWindow(Browser* browser);
 
diff --git a/chrome/browser/cocoa/browser_window_cocoa.h b/chrome/browser/cocoa/browser_window_cocoa.h
index 86a5e57..b0ace80 100644
--- a/chrome/browser/cocoa/browser_window_cocoa.h
+++ b/chrome/browser/cocoa/browser_window_cocoa.h
@@ -102,7 +102,6 @@ class BrowserWindowCocoa : public BrowserWindow,
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
-  virtual void ToggleTabStripMode();
 
   // Overridden from NotificationObserver
   virtual void Observe(NotificationType type,
diff --git a/chrome/browser/cocoa/browser_window_cocoa.mm b/chrome/browser/cocoa/browser_window_cocoa.mm
index e9d0a31..01d592e 100644
--- a/chrome/browser/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/cocoa/browser_window_cocoa.mm
@@ -540,10 +540,6 @@ void BrowserWindowCocoa::Paste() {
   [NSApp sendAction:@selector(paste:) to:nil from:nil];
 }
 
-void BrowserWindowCocoa::ToggleTabStripMode() {
-  NOTIMPLEMENTED();
-}
-
 void BrowserWindowCocoa::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {
diff --git a/chrome/browser/cocoa/tab_strip_controller_unittest.mm b/chrome/browser/cocoa/tab_strip_controller_unittest.mm
index f32e1f7..0967ae4 100644
--- a/chrome/browser/cocoa/tab_strip_controller_unittest.mm
+++ b/chrome/browser/cocoa/tab_strip_controller_unittest.mm
@@ -63,8 +63,6 @@ class TestTabStripDelegate : public TabStripModelDelegate {
   virtual bool CanBookmarkAllTabs() const { return false; }
 
   virtual void BookmarkAllTabs() {}
-  virtual bool UseVerticalTabs() const { return false; }
-  virtual void ToggleUseVerticalTabs() {}
 };
 
 class TabStripControllerTest : public CocoaTest {
diff --git a/chrome/browser/gtk/browser_window_gtk.cc b/chrome/browser/gtk/browser_window_gtk.cc
index e79da68..873ad44 100644
--- a/chrome/browser/gtk/browser_window_gtk.cc
+++ b/chrome/browser/gtk/browser_window_gtk.cc
@@ -1044,10 +1044,6 @@ void BrowserWindowGtk::Paste() {
   DoCutCopyPaste(this, &RenderViewHost::Paste, "paste-clipboard");
 }
 
-void BrowserWindowGtk::ToggleTabStripMode() {
-  NOTIMPLEMENTED();
-}
-
 void BrowserWindowGtk::ConfirmBrowserCloseWithPendingDownloads() {
   new DownloadInProgressDialogGtk(browser());
 }
diff --git a/chrome/browser/gtk/browser_window_gtk.h b/chrome/browser/gtk/browser_window_gtk.h
index db1aba2..f24e094 100644
--- a/chrome/browser/gtk/browser_window_gtk.h
+++ b/chrome/browser/gtk/browser_window_gtk.h
@@ -120,7 +120,6 @@ class BrowserWindowGtk : public BrowserWindow,
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
-  virtual void ToggleTabStripMode();
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
diff --git a/chrome/browser/tab_menu_model.cc b/chrome/browser/tab_menu_model.cc
index 2845240..f0fe251 100644
--- a/chrome/browser/tab_menu_model.cc
+++ b/chrome/browser/tab_menu_model.cc
@@ -43,9 +43,4 @@ void TabMenuModel::Build() {
   AddItemWithStringId(TabStripModel::CommandRestoreTab, IDS_RESTORE_TAB);
   AddItemWithStringId(TabStripModel::CommandBookmarkAllTabs,
                       IDS_TAB_CXMENU_BOOKMARK_ALL_TABS);
-#if defined(OS_WIN)
-  AddSeparator();
-  AddCheckItemWithStringId(TabStripModel::CommandUseVerticalTabs,
-                           IDS_TAB_CXMENU_USE_VERTICAL_TABS);
-#endif
 }
diff --git a/chrome/browser/tabs/tab_strip_model.cc b/chrome/browser/tabs/tab_strip_model.cc
index dc9b968..2fba4b5 100644
--- a/chrome/browser/tabs/tab_strip_model.cc
+++ b/chrome/browser/tabs/tab_strip_model.cc
@@ -574,25 +574,11 @@ bool TabStripModel::IsContextMenuCommandEnabled(
       return delegate_->CanRestoreTab();
     case CommandTogglePinned:
       return true;
-    case CommandBookmarkAllTabs:
+    case CommandBookmarkAllTabs: {
       return delegate_->CanBookmarkAllTabs();
-    case CommandUseVerticalTabs:
-      return true;
-    default:
-      NOTREACHED();
-  }
-  return false;
-}
-
-bool TabStripModel::IsContextMenuCommandChecked(
-    int context_index,
-    ContextMenuCommand command_id) const {
-  switch (command_id) {
-    case CommandUseVerticalTabs:
-      return delegate()->UseVerticalTabs();
+    }
     default:
       NOTREACHED();
-      break;
   }
   return false;
 }
@@ -670,12 +656,6 @@ void TabStripModel::ExecuteContextMenuCommand(
       delegate_->BookmarkAllTabs();
       break;
     }
-    case CommandUseVerticalTabs: {
-      UserMetrics::RecordAction("TabContextMenu_UseVerticalTabs", profile_);
-
-      delegate()->ToggleUseVerticalTabs();
-      break;
-    }
     default:
       NOTREACHED();
   }
diff --git a/chrome/browser/tabs/tab_strip_model.h b/chrome/browser/tabs/tab_strip_model.h
index 1f5214f..a4c3641 100644
--- a/chrome/browser/tabs/tab_strip_model.h
+++ b/chrome/browser/tabs/tab_strip_model.h
@@ -223,12 +223,6 @@ class TabStripModelDelegate {
 
   // Creates a bookmark folder containing a bookmark for all open tabs.
   virtual void BookmarkAllTabs() = 0;
-
-  // Returns true if the vertical tabstrip presentation should be used.
-  virtual bool UseVerticalTabs() const = 0;
-
-  // Toggles the use of the vertical tabstrip.
-  virtual void ToggleUseVerticalTabs() = 0;
 };
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -553,7 +547,6 @@ class TabStripModel : public NotificationObserver {
     CommandRestoreTab,
     CommandTogglePinned,
     CommandBookmarkAllTabs,
-    CommandUseVerticalTabs,
     CommandLast
   };
 
@@ -561,10 +554,6 @@ class TabStripModel : public NotificationObserver {
   bool IsContextMenuCommandEnabled(int context_index,
                                    ContextMenuCommand command_id) const;
 
-  // Returns true if the specified command is checked.
-  bool IsContextMenuCommandChecked(int context_index,
-                                   ContextMenuCommand command_id) const;
-
   // Performs the action associated with the specified command for the given
   // TabStripModel index |context_index|.
   void ExecuteContextMenuCommand(int context_index,
diff --git a/chrome/browser/tabs/tab_strip_model_unittest.cc b/chrome/browser/tabs/tab_strip_model_unittest.cc
index 60251f2..ac5881a2 100644
--- a/chrome/browser/tabs/tab_strip_model_unittest.cc
+++ b/chrome/browser/tabs/tab_strip_model_unittest.cc
@@ -70,8 +70,6 @@ class TabStripDummyDelegate : public TabStripModelDelegate {
   virtual bool CanCloseContentsAt(int index) { return can_close_ ; }
   virtual bool CanBookmarkAllTabs() const { return false; }
   virtual void BookmarkAllTabs() {}
-  virtual bool UseVerticalTabs() const { return false; }
-  virtual void ToggleUseVerticalTabs() {}
 
  private:
   // A dummy TabContents we give to callers that expect us to actually build a
diff --git a/chrome/browser/views/frame/browser_frame.h b/chrome/browser/views/frame/browser_frame.h
index 392200d..fd94d51 100644
--- a/chrome/browser/views/frame/browser_frame.h
+++ b/chrome/browser/views/frame/browser_frame.h
@@ -41,6 +41,10 @@ class BrowserFrame {
   // construction.
   virtual views::Window* GetWindow() = 0;
 
+  // Notification that the tab strip has been created. This should let the
+  // BrowserRootView know about it so it can enable drag and drop.
+  virtual void TabStripCreated(BaseTabStrip* tabstrip) = 0;
+
   // Determine the distance of the left edge of the minimize button from the
   // left edge of the window. Used in our Non-Client View's Layout.
   virtual int GetMinimizeButtonOffset() const = 0;
@@ -70,10 +74,6 @@ class BrowserFrame {
   // calls this method _after_ the TabStrip has painted itself so the shadow is
   // rendered above the tabs.
   virtual void PaintTabStripShadow(gfx::Canvas* canvas) = 0;
-
-  // Notifies the frame that the tab strip display mode changed so it can update
-  // its frame treatment if necessary.
-  virtual void TabStripDisplayModeChanged() = 0;
 };
 
 #endif  // CHROME_BROWSER_VIEWS_FRAME_BROWSER_FRAME_H_
diff --git a/chrome/browser/views/frame/browser_frame_gtk.cc b/chrome/browser/views/frame/browser_frame_gtk.cc
index 97fbedc..9e1699c 100644
--- a/chrome/browser/views/frame/browser_frame_gtk.cc
+++ b/chrome/browser/views/frame/browser_frame_gtk.cc
@@ -102,6 +102,9 @@ views::Window* BrowserFrameGtk::GetWindow() {
   return this;
 }
 
+void BrowserFrameGtk::TabStripCreated(BaseTabStrip* tabstrip) {
+}
+
 int BrowserFrameGtk::GetMinimizeButtonOffset() const {
   NOTIMPLEMENTED();
   return 0;
@@ -136,9 +139,6 @@ views::View* BrowserFrameGtk::GetFrameView() const {
 void BrowserFrameGtk::PaintTabStripShadow(gfx::Canvas* canvas) {
 }
 
-void BrowserFrameGtk::TabStripDisplayModeChanged() {
-}
-
 ThemeProvider* BrowserFrameGtk::GetThemeProvider() const {
   return profile_->GetThemeProvider();
 }
diff --git a/chrome/browser/views/frame/browser_frame_gtk.h b/chrome/browser/views/frame/browser_frame_gtk.h
index f8e8f2a..93330c1 100644
--- a/chrome/browser/views/frame/browser_frame_gtk.h
+++ b/chrome/browser/views/frame/browser_frame_gtk.h
@@ -28,6 +28,7 @@ class BrowserFrameGtk : public BrowserFrame,
 
   // Overridden from BrowserFrame:
   virtual views::Window* GetWindow();
+  virtual void TabStripCreated(BaseTabStrip* tabstrip);
   virtual int GetMinimizeButtonOffset() const;
   virtual gfx::Rect GetBoundsForTabStrip(BaseTabStrip* tabstrip) const;
   virtual void UpdateThrobber(bool running);
@@ -36,7 +37,6 @@ class BrowserFrameGtk : public BrowserFrame,
   virtual bool AlwaysUseNativeFrame() const;
   virtual views::View* GetFrameView() const;
   virtual void PaintTabStripShadow(gfx::Canvas* canvas);
-  virtual void TabStripDisplayModeChanged();
 
   // Overridden from views::Widget:
   virtual ThemeProvider* GetThemeProvider() const;
diff --git a/chrome/browser/views/frame/browser_frame_win.cc b/chrome/browser/views/frame/browser_frame_win.cc
index 4578829..696e109 100644
--- a/chrome/browser/views/frame/browser_frame_win.cc
+++ b/chrome/browser/views/frame/browser_frame_win.cc
@@ -69,6 +69,9 @@ views::Window* BrowserFrameWin::GetWindow() {
   return this;
 }
 
+void BrowserFrameWin::TabStripCreated(BaseTabStrip* tabstrip) {
+}
+
 int BrowserFrameWin::GetMinimizeButtonOffset() const {
   TITLEBARINFOEX titlebar_info;
   titlebar_info.cbSize = sizeof(TITLEBARINFOEX);
@@ -124,14 +127,6 @@ void BrowserFrameWin::PaintTabStripShadow(gfx::Canvas* canvas) {
   browser_frame_view_->PaintTabStripShadow(canvas);
 }
 
-void BrowserFrameWin::TabStripDisplayModeChanged() {
-  UpdateDWMFrame();
-  // We need to relayout only after the window frame has had a chance to update
-  // the size/position of its controls (e.g. minimize/maximize/close) so that
-  // the tabstrip can layout at its correct bounds.
-  GetRootView()->Layout();
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrame, views::WindowWin overrides:
 
@@ -299,7 +294,7 @@ void BrowserFrameWin::UpdateDWMFrame() {
     // In maximized mode, we only have a titlebar strip of glass, no side/bottom
     // borders.
     if (!browser_view_->IsFullscreen()) {
-      if (browser_view_->UseVerticalTabs()) {
+      if (browser_view_->UsingSideTabs()) {
         margins.cxLeftWidth +=
             GetBoundsForTabStrip(browser_view_->tabstrip()).right();
         margins.cyTopHeight += GetSystemMetrics(SM_CYSIZEFRAME);
@@ -314,7 +309,7 @@ void BrowserFrameWin::UpdateDWMFrame() {
   DwmExtendFrameIntoClientArea(GetNativeView(), &margins);
 
   DWORD window_style = GetWindowLong(GWL_STYLE);
-  if (browser_view_->UseVerticalTabs()) {
+  if (browser_view_->UsingSideTabs()) {
     if (window_style & WS_CAPTION)
       SetWindowLong(GWL_STYLE, window_style & ~WS_CAPTION);
   } else {
diff --git a/chrome/browser/views/frame/browser_frame_win.h b/chrome/browser/views/frame/browser_frame_win.h
index 42e8974..d928f93 100644
--- a/chrome/browser/views/frame/browser_frame_win.h
+++ b/chrome/browser/views/frame/browser_frame_win.h
@@ -37,6 +37,7 @@ class BrowserFrameWin : public BrowserFrame, public views::WindowWin {
 
   // BrowserFrame implementation.
   virtual views::Window* GetWindow();
+  virtual void TabStripCreated(BaseTabStrip* tabstrip);
   virtual int GetMinimizeButtonOffset() const;
   virtual gfx::Rect GetBoundsForTabStrip(BaseTabStrip* tabstrip) const;
   virtual void UpdateThrobber(bool running);
@@ -45,7 +46,6 @@ class BrowserFrameWin : public BrowserFrame, public views::WindowWin {
   virtual bool AlwaysUseNativeFrame() const;
   virtual views::View* GetFrameView() const;
   virtual void PaintTabStripShadow(gfx::Canvas* canvas);
-  virtual void TabStripDisplayModeChanged();
 
  protected:
   // Overridden from views::WindowWin:
diff --git a/chrome/browser/views/frame/browser_view.cc b/chrome/browser/views/frame/browser_view.cc
index f8e4da4..3312812 100644
--- a/chrome/browser/views/frame/browser_view.cc
+++ b/chrome/browser/views/frame/browser_view.cc
@@ -544,8 +544,8 @@ bool BrowserView::IsTabStripVisible() const {
   return browser_->SupportsWindowFeature(Browser::FEATURE_TABSTRIP);
 }
 
-bool BrowserView::UseVerticalTabs() const {
-  return browser_->tabstrip_model()->delegate()->UseVerticalTabs();
+bool BrowserView::UsingSideTabs() const {
+  return SideTabStrip::Visible(browser_->profile());
 }
 
 bool BrowserView::IsOffTheRecord() const {
@@ -1224,11 +1224,6 @@ void BrowserView::Paste() {
                             false, false);
 }
 
-void BrowserView::ToggleTabStripMode() {
-  InitTabStrip(browser_->tabstrip_model());
-  frame_->TabStripDisplayModeChanged();
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserView, BrowserWindowTesting implementation:
 
@@ -1646,32 +1641,13 @@ views::LayoutManager* BrowserView::CreateLayoutManager() const {
   return new BrowserViewLayout;
 }
 
-void BrowserView::InitTabStrip(TabStripModel* model) {
-// Throw away the existing tabstrip if we're switching display modes.
-  if (tabstrip_) {
-    tabstrip_->GetParent()->RemoveChildView(tabstrip_);
-    delete tabstrip_;
-  }
-
-  TabStrip* tabstrip_as_tabstrip = NULL;
-  BrowserTabStripController* tabstrip_controller = NULL;
-
-  if (UseVerticalTabs()) {
+BaseTabStrip* BrowserView::CreateTabStrip(TabStripModel* model) {
+  if (UsingSideTabs()) {
     SideTabStrip* tabstrip = new SideTabStrip;
-    tabstrip_controller = new BrowserTabStripController(model, tabstrip);
-    tabstrip->SetModel(tabstrip_controller);
-    tabstrip_ = tabstrip;
-  } else {
-    tabstrip_as_tabstrip = new TabStrip(model);
-    tabstrip_ = tabstrip_as_tabstrip;
+    tabstrip->SetModel(new BrowserTabStripController(model, tabstrip));
+    return tabstrip;
   }
-  tabstrip_->SetAccessibleName(l10n_util::GetString(IDS_ACCNAME_TABSTRIP));
-  AddChildView(tabstrip_);
-
-  if (tabstrip_controller)
-    tabstrip_controller->InitFromModel();
-  else
-    tabstrip_as_tabstrip->InitFromModel();
+  return new TabStrip(model);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -1698,7 +1674,10 @@ void BrowserView::Init() {
   LoadAccelerators();
   SetAccessibleName(l10n_util::GetString(IDS_PRODUCT_NAME));
 
-  InitTabStrip(browser_->tabstrip_model());
+  tabstrip_ = CreateTabStrip(browser_->tabstrip_model());
+  tabstrip_->SetAccessibleName(l10n_util::GetString(IDS_ACCNAME_TABSTRIP));
+  AddChildView(tabstrip_);
+  frame_->TabStripCreated(tabstrip_);
 
   toolbar_ = new ToolbarView(browser_.get());
   AddChildView(toolbar_);
diff --git a/chrome/browser/views/frame/browser_view.h b/chrome/browser/views/frame/browser_view.h
index 5452bc8..bf753e9 100644
--- a/chrome/browser/views/frame/browser_view.h
+++ b/chrome/browser/views/frame/browser_view.h
@@ -151,7 +151,7 @@ class BrowserView : public BrowserBubbleHost,
   bool IsTabStripVisible() const;
 
   // Returns true if the vertical tabstrip is in use.
-  bool UseVerticalTabs() const;
+  bool UsingSideTabs() const;
 
   // Returns true if the profile associated with this Browser window is
   // off the record.
@@ -322,7 +322,6 @@ class BrowserView : public BrowserBubbleHost,
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
-  virtual void ToggleTabStripMode();
 
   // Overridden from BrowserWindowTesting:
   virtual BookmarkBarView* GetBookmarkBarView() const;
@@ -398,10 +397,9 @@ class BrowserView : public BrowserBubbleHost,
   // override to implemnet different layout pocily.
   virtual views::LayoutManager* CreateLayoutManager() const;
 
-  // Initializes a new TabStrip for the browser view. This can be performed
-  // multiple times over the life of the browser, and is run when the display
-  // mode for the tabstrip changes from horizontal to vertical.
-  void InitTabStrip(TabStripModel* tab_strip_model);
+  // Returns a new TabStrip for the browser view. A subclass may
+  // override to return a different TabStrip implementation.
+  virtual BaseTabStrip* CreateTabStrip(TabStripModel* tab_strip_model);
 
   // Browser window related initializations.
   virtual void Init();
diff --git a/chrome/browser/views/frame/browser_view_layout.cc b/chrome/browser/views/frame/browser_view_layout.cc
index e632534..2c11574 100644
--- a/chrome/browser/views/frame/browser_view_layout.cc
+++ b/chrome/browser/views/frame/browser_view_layout.cc
@@ -285,7 +285,7 @@ int BrowserViewLayout::LayoutTabStrip() {
   gfx::Rect layout_bounds =
       browser_view_->frame()->GetBoundsForTabStrip(tabstrip_);
 
-  if (browser_view_->UseVerticalTabs()) {
+  if (browser_view_->UsingSideTabs()) {
     vertical_layout_rect_.Inset(
         layout_bounds.right() - kBrowserViewTabStripHorizontalOverlap, 0, 0, 0);
   } else {
@@ -301,7 +301,7 @@ int BrowserViewLayout::LayoutTabStrip() {
   layout_bounds.set_origin(tabstrip_origin);
   tabstrip_->SetVisible(true);
   tabstrip_->SetBounds(layout_bounds);
-  return browser_view_->UseVerticalTabs() ? 0 : layout_bounds.bottom();
+  return browser_view_->UsingSideTabs() ? 0 : layout_bounds.bottom();
 }
 
 int BrowserViewLayout::LayoutToolbar(int top) {
@@ -309,7 +309,7 @@ int BrowserViewLayout::LayoutToolbar(int top) {
   bool visible = browser_view_->IsToolbarVisible();
   toolbar_->location_bar()->SetFocusable(visible);
   int y = 0;
-  if (!browser_view_->UseVerticalTabs()) {
+  if (!browser_view_->UsingSideTabs()) {
     y = top -
       ((visible && browser_view_->IsTabStripVisible())
        ? kToolbarTabStripVerticalOverlap : 0);
diff --git a/chrome/browser/views/frame/glass_browser_frame_view.cc b/chrome/browser/views/frame/glass_browser_frame_view.cc
index f62d063..04c2bd6 100644
--- a/chrome/browser/views/frame/glass_browser_frame_view.cc
+++ b/chrome/browser/views/frame/glass_browser_frame_view.cc
@@ -83,7 +83,7 @@ GlassBrowserFrameView::~GlassBrowserFrameView() {
 
 gfx::Rect GlassBrowserFrameView::GetBoundsForTabStrip(
     BaseTabStrip* tabstrip) const {
-  if (browser_view_->UseVerticalTabs()) {
+  if (browser_view_->UsingSideTabs()) {
     gfx::Size ps = tabstrip->GetPreferredSize();
     return gfx::Rect(0, NonClientTopBorderHeight(), ps.width(),
                      browser_view_->height());
@@ -120,9 +120,6 @@ void GlassBrowserFrameView::UpdateThrobber(bool running) {
 }
 
 void GlassBrowserFrameView::PaintTabStripShadow(gfx::Canvas* canvas) {
-  if (!browser_view_->UseVerticalTabs())
-    return;
-
   ThemeProvider* tp = GetThemeProvider();
   SkBitmap* shadow_top = tp->GetBitmapNamed(IDR_SIDETABS_SHADOW_TOP);
   SkBitmap* shadow_middle = tp->GetBitmapNamed(IDR_SIDETABS_SHADOW_MIDDLE);
@@ -245,7 +242,7 @@ int GlassBrowserFrameView::NonClientTopBorderHeight() const {
   // We'd like to use FrameBorderThickness() here, but the maximized Aero glass
   // frame has a 0 frame border around most edges and a CXSIZEFRAME-thick border
   // at the top (see AeroGlassFrame::OnGetMinMaxInfo()).
-  const int kRestoredHeight = browser_view_->UseVerticalTabs() ?
+  const int kRestoredHeight = browser_view_->UsingSideTabs() ?
       -2 : kNonClientRestoredExtraThickness;
   return GetSystemMetrics(SM_CXSIZEFRAME) + (browser_view_->IsMaximized() ?
       -kTabstripTopShadowThickness : kRestoredHeight);
@@ -277,7 +274,7 @@ void GlassBrowserFrameView::PaintToolbarBackground(gfx::Canvas* canvas) {
 
   // Draw the toolbar background, setting src_y of the paint to the tab
   // strip height as the toolbar background begins at the top of the tabs.
-  int src_y = browser_view_->UseVerticalTabs()
+  int src_y = browser_view_->UsingSideTabs()
       ? TabRenderer::GetMinimumUnselectedSize().height()
       : browser_view_->GetTabStripHeight() - 1;
   canvas->TileImageInt(*theme_toolbar, 0, src_y,
@@ -327,7 +324,7 @@ void GlassBrowserFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
       tp->GetBitmapNamed(IDR_CONTENT_TOP_LEFT_CORNER)->height();
 
   gfx::Rect client_area_bounds = CalculateClientAreaBounds(width(), height());
-  if (browser_view_->UseVerticalTabs()) {
+  if (browser_view_->UsingSideTabs()) {
     client_area_bounds.Inset(
         GetBoundsForTabStrip(browser_view_->tabstrip()).width() - 4, 0, 0, 0);
   }
diff --git a/chrome/browser/views/tabs/browser_tab_strip_controller.cc b/chrome/browser/views/tabs/browser_tab_strip_controller.cc
index da30f47..343ee09 100644
--- a/chrome/browser/views/tabs/browser_tab_strip_controller.cc
+++ b/chrome/browser/views/tabs/browser_tab_strip_controller.cc
@@ -5,68 +5,7 @@
 #include "chrome/browser/views/tabs/browser_tab_strip_controller.h"
 
 #include "chrome/browser/tab_contents/tab_contents.h"
-#include "chrome/browser/tab_menu_model.h"
 #include "chrome/browser/views/tabs/side_tab_strip.h"
-#include "views/controls/menu/menu_2.h"
-#include "views/widget/widget.h"
-
-class BrowserTabStripController::TabContextMenuContents
-    : public menus::SimpleMenuModel::Delegate {
- public:
-  TabContextMenuContents(int tab_index, BrowserTabStripController* controller)
-      : ALLOW_THIS_IN_INITIALIZER_LIST(model_(this)),
-        tab_index_(tab_index),
-        controller_(controller) {
-    Build();
-  }
-  virtual ~TabContextMenuContents() {
-    menu_->CancelMenu();
-  }
-
-  void RunMenuAt(const gfx::Point& point) {
-    menu_->RunMenuAt(point, views::Menu2::ALIGN_TOPLEFT);
-  }
-
-  // Overridden from menus::SimpleMenuModel::Delegate:
-  virtual bool IsCommandIdChecked(int command_id) const {
-    return controller_->IsCommandCheckedForTab(
-        static_cast<TabStripModel::ContextMenuCommand>(command_id),
-        tab_index_);
-  }
-  virtual bool IsCommandIdEnabled(int command_id) const {
-    return controller_->IsCommandEnabledForTab(
-        static_cast<TabStripModel::ContextMenuCommand>(command_id),
-        tab_index_);
-  }
-  virtual bool GetAcceleratorForCommandId(
-      int command_id,
-      menus::Accelerator* accelerator) {
-    return controller_->tabstrip_->GetWidget()->GetAccelerator(command_id,
-                                                               accelerator);
-  }
-  virtual void ExecuteCommand(int command_id) {
-    controller_->ExecuteCommandForTab(
-        static_cast<TabStripModel::ContextMenuCommand>(command_id),
-        tab_index_);
-  }
-
- private:
-  void Build() {
-    menu_.reset(new views::Menu2(&model_));
-  }
-
-  TabMenuModel model_;
-  scoped_ptr<views::Menu2> menu_;
-
-  // The index of the tab we are showing the context menu for.
-  int tab_index_;
-
-  // A pointer back to our hosting controller, for command state information.
-  BrowserTabStripController* controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(TabContextMenuContents);
-};
-
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserTabStripController, public:
@@ -79,40 +18,6 @@ BrowserTabStripController::BrowserTabStripController(TabStripModel* model,
 }
 
 BrowserTabStripController::~BrowserTabStripController() {
-  model_->RemoveObserver(this);
-}
-
-void BrowserTabStripController::InitFromModel() {
-  // Walk the model, calling our insertion observer method for each item within
-  // it.
-  for (int i = 0; i < model_->count(); ++i) {
-    TabInsertedAt(model_->GetTabContentsAt(i), i,
-                  i == model_->selected_index());
-  }
-}
-
-bool BrowserTabStripController::IsCommandEnabledForTab(
-    TabStripModel::ContextMenuCommand command_id, int tab_index) const {
-  if (model_->ContainsIndex(tab_index))
-    return model_->IsContextMenuCommandEnabled(tab_index, command_id);
-  return false;
-}
-
-bool BrowserTabStripController::IsCommandCheckedForTab(
-    TabStripModel::ContextMenuCommand command_id, int tab_index) const {
-  // TODO(beng): move to TabStripModel, see note in IsTabPinned.
-  if (command_id == TabStripModel::CommandTogglePinned)
-    return false;
-
-  if (model_->ContainsIndex(tab_index))
-    return model_->IsContextMenuCommandChecked(tab_index, command_id);
-  return false;
-}
-
-void BrowserTabStripController::ExecuteCommandForTab(
-    TabStripModel::ContextMenuCommand command_id, int tab_index) {
-  if (model_->ContainsIndex(tab_index))
-    model_->ExecuteContextMenuCommand(tab_index, command_id);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -148,13 +53,6 @@ void BrowserTabStripController::CloseTab(int index) {
   model_->CloseTabContentsAt(index);
 }
 
-void BrowserTabStripController::ShowContextMenu(int index,
-                                                const gfx::Point& p) {
-  if (!context_menu_contents_.get())
-    context_menu_contents_.reset(new TabContextMenuContents(index, this));
-  context_menu_contents_->RunMenuAt(p);
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserTabStripController, TabStripModelObserver implementation:
 
diff --git a/chrome/browser/views/tabs/browser_tab_strip_controller.h b/chrome/browser/views/tabs/browser_tab_strip_controller.h
index c50fcdb..e127659 100644
--- a/chrome/browser/views/tabs/browser_tab_strip_controller.h
+++ b/chrome/browser/views/tabs/browser_tab_strip_controller.h
@@ -5,8 +5,6 @@
 #ifndef CHROME_BROWSER_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 
-#include "base/scoped_ptr.h"
-
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/views/tabs/side_tab_strip_model.h"
 
@@ -20,15 +18,6 @@ class BrowserTabStripController : public SideTabStripModel,
   BrowserTabStripController(TabStripModel* model, SideTabStrip* tabstrip);
   virtual ~BrowserTabStripController();
 
-  void InitFromModel();
-
-  bool IsCommandEnabledForTab(TabStripModel::ContextMenuCommand command_id,
-                              int tab_index) const;
-  bool IsCommandCheckedForTab(TabStripModel::ContextMenuCommand command_id,
-                              int tab_index) const;
-  void ExecuteCommandForTab(TabStripModel::ContextMenuCommand command_id,
-                            int tab_index);
-
   // SideTabStripModel implementation:
   virtual SkBitmap GetIcon(int index) const;
   virtual string16 GetTitle(int index) const;
@@ -36,7 +25,6 @@ class BrowserTabStripController : public SideTabStripModel,
   virtual NetworkState GetNetworkState(int index) const;
   virtual void SelectTab(int index);
   virtual void CloseTab(int index);
-  virtual void ShowContextMenu(int index, const gfx::Point& p);
 
   // TabStripModelObserver implementation:
   virtual void TabInsertedAt(TabContents* contents, int index,
@@ -55,14 +43,9 @@ class BrowserTabStripController : public SideTabStripModel,
   virtual void TabBlockedStateChanged(TabContents* contents, int index);
 
  private:
-  class TabContextMenuContents;
-
   TabStripModel* model_;
   SideTabStrip* tabstrip_;
 
-  // If non-NULL it means we're showing a menu for the tab.
-  scoped_ptr<TabContextMenuContents> context_menu_contents_;
-
   DISALLOW_COPY_AND_ASSIGN(BrowserTabStripController);
 };
 
diff --git a/chrome/browser/views/tabs/side_tab.cc b/chrome/browser/views/tabs/side_tab.cc
index ee160d7..c08eaaa 100644
--- a/chrome/browser/views/tabs/side_tab.cc
+++ b/chrome/browser/views/tabs/side_tab.cc
@@ -56,8 +56,6 @@ SideTab::SideTab(SideTabModel* model)
 
   hover_animation_.reset(new SlideAnimation(this));
   hover_animation_->SetSlideDuration(kHoverDurationMs);
-
-  SetContextMenuController(this);
 }
 
 SideTab::~SideTab() {
@@ -112,15 +110,6 @@ void SideTab::ButtonPressed(views::Button* sender, const views::Event& event) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// SideTab, views::ContextMenuController implementation:
-
-void SideTab::ShowContextMenu(views::View* source,
-                              const gfx::Point& p,
-                              bool is_mouse_gesture) {
-  model_->ShowContextMenu(this, p);
-}
-
-////////////////////////////////////////////////////////////////////////////////
 // SideTab, views::View overrides:
 
 void SideTab::Layout() {
@@ -130,19 +119,14 @@ void SideTab::Layout() {
 
   gfx::Size ps = close_button_->GetPreferredSize();
   int close_y = (height() - ps.height()) / 2;
-  close_button_->SetBounds(
-      std::max(0, width() - ps.width() - close_y),
-      close_y,
-      ps.width(),
-      ps.height());
+  close_button_->SetBounds(width() - ps.width() - close_y, close_y, ps.width(),
+                           ps.height());
 
   int title_y = (height() - font_->height()) / 2;
   int title_x = icon_bounds_.right() + kIconTitleSpacing;
-  title_bounds_.SetRect(
-      title_x,
-      title_y,
-      std::max(0, close_button_->x() - kTitleCloseSpacing - title_x),
-      font_->height());
+  title_bounds_.SetRect(title_x, title_y,
+                        close_button_->x() - kTitleCloseSpacing - title_x,
+                        font_->height());
 }
 
 void SideTab::Paint(gfx::Canvas* canvas) {
diff --git a/chrome/browser/views/tabs/side_tab.h b/chrome/browser/views/tabs/side_tab.h
index 59e568b..72fc8b0 100644
--- a/chrome/browser/views/tabs/side_tab.h
+++ b/chrome/browser/views/tabs/side_tab.h
@@ -26,13 +26,9 @@ class SideTabModel {
 
   // Closes the tab.
   virtual void CloseTab(SideTab* tab) = 0;
-
-  // Shows a context menu for the tab at the specified point in screen coords.
-  virtual void ShowContextMenu(SideTab* tab, const gfx::Point& p) = 0;
 };
 
 class SideTab : public views::View,
-                public views::ContextMenuController,
                 public views::ButtonListener,
                 public AnimationDelegate {
  public:
@@ -52,11 +48,6 @@ class SideTab : public views::View,
   // views::ButtonListener implementation:
   virtual void ButtonPressed(views::Button* sender, const views::Event& event);
 
-  // views::ContextMenuController implementation:
-  virtual void ShowContextMenu(views::View* source,
-                               const gfx::Point& p,
-                               bool is_mouse_gesture);
-
   // views::View Overrides:
   virtual void Layout();
   virtual void Paint(gfx::Canvas* canvas);
diff --git a/chrome/browser/views/tabs/side_tab_strip.cc b/chrome/browser/views/tabs/side_tab_strip.cc
index 6912f2c..6896d42 100644
--- a/chrome/browser/views/tabs/side_tab_strip.cc
+++ b/chrome/browser/views/tabs/side_tab_strip.cc
@@ -38,6 +38,12 @@ bool SideTabStrip::Available() {
       switches::kEnableVerticalTabs);
 }
 
+// static
+bool SideTabStrip::Visible(Profile* profile) {
+  return Available() &&
+      profile->GetPrefs()->GetBoolean(prefs::kUseVerticalTabs);
+}
+
 void SideTabStrip::AddTabAt(int index) {
   SideTab* tab = new SideTab(this);
   AddChildView(tab);
@@ -82,10 +88,6 @@ void SideTabStrip::CloseTab(SideTab* tab) {
   model_->CloseTab(GetIndexOfSideTab(tab));
 }
 
-void SideTabStrip::ShowContextMenu(SideTab* tab, const gfx::Point& p) {
-  model_->ShowContextMenu(GetIndexOfSideTab(tab), p);
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // SideTabStrip, BaseTabStrip implementation:
 
diff --git a/chrome/browser/views/tabs/side_tab_strip.h b/chrome/browser/views/tabs/side_tab_strip.h
index b1716ba..71b704a 100644
--- a/chrome/browser/views/tabs/side_tab_strip.h
+++ b/chrome/browser/views/tabs/side_tab_strip.h
@@ -25,6 +25,10 @@ class SideTabStrip : public BaseTabStrip,
   // command line flag that allows the SideTabStrip to be optionally shown.
   static bool Available();
 
+  // Whether or not the vertical tabstrip is shown. Only valid if Available()
+  // returns true.
+  static bool Visible(Profile* profile);
+
   // Notifies the SideTabStrip that a tab was added in the model at |index|.
   void AddTabAt(int index);
 
@@ -44,7 +48,6 @@ class SideTabStrip : public BaseTabStrip,
   virtual bool IsSelected(SideTab* tab) const;
   virtual void SelectTab(SideTab* tab);
   virtual void CloseTab(SideTab* tab);
-  virtual void ShowContextMenu(SideTab* tab, const gfx::Point& p);
 
   // BaseTabStrip implementation:
   virtual int GetPreferredHeight();
diff --git a/chrome/browser/views/tabs/side_tab_strip_model.h b/chrome/browser/views/tabs/side_tab_strip_model.h
index 835e5ba..a456c36 100644
--- a/chrome/browser/views/tabs/side_tab_strip_model.h
+++ b/chrome/browser/views/tabs/side_tab_strip_model.h
@@ -7,17 +7,12 @@
 
 #include "base/string16.h"
 
-namespace gfx {
-class Point;
-}
 class SkBitmap;
 
 // A model interface implemented by an object that can provide information
 // about SideTabs in a SideTabStrip.
 class SideTabStripModel {
  public:
-  virtual ~SideTabStripModel() {}
-
   // Returns metadata about the tab at the specified index.
   virtual SkBitmap GetIcon(int index) const = 0;
   virtual string16 GetTitle(int index) const = 0;
@@ -40,10 +35,6 @@ class SideTabStripModel {
 
   // Closes the tab at the specified index in the model.
   virtual void CloseTab(int index) = 0;
-
-  // Shows a context menu for the tab at the specified index at the specified
-  // point in screen coords.
-  virtual void ShowContextMenu(int index, const gfx::Point& p) = 0;
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TABS_SIDE_TAB_STRIP_MODEL_H_
diff --git a/chrome/browser/views/tabs/tab.cc b/chrome/browser/views/tabs/tab.cc
index 275af42..4c6aa46 100644
--- a/chrome/browser/views/tabs/tab.cc
+++ b/chrome/browser/views/tabs/tab.cc
@@ -51,9 +51,9 @@ class Tab::TabContextMenuContents : public menus::SimpleMenuModel::Delegate {
 
   // Overridden from menus::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdChecked(int command_id) const {
-    return tab_ && tab_->delegate()->IsCommandCheckedForTab(
-        static_cast<TabStripModel::ContextMenuCommand>(command_id),
-        tab_);
+    if (!tab_ || command_id != TabStripModel::CommandTogglePinned)
+      return false;
+    return tab_->delegate()->IsTabPinned(tab_);
   }
   virtual bool IsCommandIdEnabled(int command_id) const {
     return tab_ && tab_->delegate()->IsCommandEnabledForTab(
diff --git a/chrome/browser/views/tabs/tab.h b/chrome/browser/views/tabs/tab.h
index 6a9bf21..f491291 100644
--- a/chrome/browser/views/tabs/tab.h
+++ b/chrome/browser/views/tabs/tab.h
@@ -46,10 +46,6 @@ class Tab : public TabRenderer,
     virtual bool IsCommandEnabledForTab(
         TabStripModel::ContextMenuCommand command_id, const Tab* tab) const = 0;
 
-    // Returns true if the specified command is checked for the specified Tab.
-    virtual bool IsCommandCheckedForTab(
-        TabStripModel::ContextMenuCommand command_id, const Tab* tab) const = 0;
-
     // Executes the specified command for the specified Tab.
     virtual void ExecuteCommandForTab(
         TabStripModel::ContextMenuCommand command_id, Tab* tab) = 0;
diff --git a/chrome/browser/views/tabs/tab_strip.cc b/chrome/browser/views/tabs/tab_strip.cc
index 80d761b..ec15794 100644
--- a/chrome/browser/views/tabs/tab_strip.cc
+++ b/chrome/browser/views/tabs/tab_strip.cc
@@ -744,7 +744,8 @@ TabStrip::TabStrip(TabStripModel* model)
 TabStrip::~TabStrip() {
   active_animation_.reset(NULL);
 
-  model_->RemoveObserver(this);
+  // TODO(beng): (1031854) Restore this line once XPFrame/VistaFrame are dead.
+  // model_->RemoveObserver(this);
 
   // TODO(beng): remove this if it doesn't work to fix the TabSelectedAt bug.
   drag_controller_.reset(NULL);
@@ -817,15 +818,6 @@ bool TabStrip::IsCompatibleWith(TabStrip* other) const {
   return model_->profile() == other->model()->profile();
 }
 
-void TabStrip::InitFromModel() {
-  // Walk the model, calling our insertion observer method for each item within
-  // it.
-  for (int i = 0; i < model_->count(); ++i) {
-    TabInsertedAt(model_->GetTabContentsAt(i), i,
-                  i == model_->selected_index());
-  }
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // TabStrip, BaseTabStrip implementation:
 
@@ -1317,18 +1309,6 @@ bool TabStrip::IsCommandEnabledForTab(
   return false;
 }
 
-bool TabStrip::IsCommandCheckedForTab(
-    TabStripModel::ContextMenuCommand command_id, const Tab* tab) const {
-  // TODO(beng): move to TabStripModel, see note in IsTabPinned.
-  if (command_id == TabStripModel::CommandTogglePinned)
-    return IsTabPinned(tab);
-
-  int index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(index))
-    return model_->IsContextMenuCommandChecked(index, command_id);
-  return false;
-}
-
 void TabStrip::ExecuteCommandForTab(
     TabStripModel::ContextMenuCommand command_id, Tab* tab) {
   int index = GetIndexOfTab(tab);
diff --git a/chrome/browser/views/tabs/tab_strip.h b/chrome/browser/views/tabs/tab_strip.h
index 4e2dec4..6285e1d 100644
--- a/chrome/browser/views/tabs/tab_strip.h
+++ b/chrome/browser/views/tabs/tab_strip.h
@@ -74,11 +74,6 @@ class TabStrip : public BaseTabStrip,
   // Compatible tab strips can transfer tabs during drag and drop.
   bool IsCompatibleWith(TabStrip* other) const;
 
-  // Populates the BaseTabStrip implementation from its model. This is primarily
-  // useful when switching between display types and there are existing tabs.
-  // Upon initial creation the TabStrip is empty.
-  void InitFromModel();
-
   // BaseTabStrip implementation:
   virtual int GetPreferredHeight();
   virtual void SetBackgroundOffset(const gfx::Point& offset);
@@ -141,8 +136,6 @@ class TabStrip : public BaseTabStrip,
   virtual void CloseTab(Tab* tab);
   virtual bool IsCommandEnabledForTab(
       TabStripModel::ContextMenuCommand command_id, const Tab* tab) const;
-  virtual bool IsCommandCheckedForTab(
-      TabStripModel::ContextMenuCommand command_id, const Tab* tab) const;
   virtual void ExecuteCommandForTab(
       TabStripModel::ContextMenuCommand command_id, Tab* tab);
   virtual void StartHighlightTabsForCommand(
diff --git a/chrome/test/test_browser_window.h b/chrome/test/test_browser_window.h
index 405f361..169afdb 100644
--- a/chrome/test/test_browser_window.h
+++ b/chrome/test/test_browser_window.h
@@ -99,7 +99,6 @@ class TestBrowserWindow : public BrowserWindow {
   virtual void Cut() { }
   virtual void Copy() { }
   virtual void Paste() { }
-  virtual void ToggleTabStripMode() { }
 
  protected:
   virtual void DestroyBrowser() {}