Proper rendering of stacked tabs for MD.

chrome/browser/ui/views/tabs/tab_strip.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 192 matching lines @@
   // ongoing this does a layout.
   void StopAnimating(bool layout);
 
   // Called to indicate whether the given URL is a supported file.
   void FileSupported(const GURL& url, bool supported);
 
   // TabController overrides:
   const ui::ListSelectionModel& GetSelectionModel() const override;
   bool SupportsMultipleSelection() override;
   bool ShouldHideCloseButtonForInactiveTabs() override;
+  bool MaySetClip() override;
   void SelectTab(Tab* tab) override;
   void ExtendSelectionTo(Tab* tab) override;
   void ToggleSelected(Tab* tab) override;
   void AddSelectionFromAnchorTo(Tab* tab) override;
   void CloseTab(Tab* tab, CloseTabSource source) override;
   void ToggleTabAudioMute(Tab* tab) override;
   void ShowContextMenuForTab(Tab* tab,
                              const gfx::Point& p,
                              ui::MenuSourceType source_type) override;
   bool IsActiveTab(const Tab* tab) const override;
   bool IsTabSelected(const Tab* tab) const override;
   bool IsTabPinned(const Tab* tab) const override;
   void MaybeStartDrag(
       Tab* tab,
       const ui::LocatedEvent& event,
       const ui::ListSelectionModel& original_selection) override;
   void ContinueDrag(views::View* view, const ui::LocatedEvent& event) override;
   bool EndDrag(EndDragReason reason) override;
   Tab* GetTabAt(Tab* tab, const gfx::Point& tab_in_tab_coordinates) override;
   void OnMouseEventInTab(views::View* source,
                          const ui::MouseEvent& event) override;
-  bool ShouldPaintTab(const Tab* tab, gfx::Rect* clip) override;
+  bool ShouldPaintTab(
+      const Tab* tab,
+      const base::Callback<gfx::Path(const gfx::Size&)>& border_callback,
+      gfx::Path* clip) override;
   bool CanPaintThrobberToLayer() const override;
   bool IsImmersiveStyle() const override;
   SkColor GetToolbarTopSeparatorColor() const override;
   int GetBackgroundResourceId(bool* custom_image) const override;
   void UpdateTabAccessibilityState(const Tab* tab,
                                    ui::AXViewState* state) override;
 
   // MouseWatcherListener overrides:
   void MouseMovedOutOfHost() override;
 
@@ skipping 404 matching lines @@
   bool immersive_style_;
 
   // Our observers.
   typedef base::ObserverList<TabStripObserver> TabStripObservers;
   TabStripObservers observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_