Proper rendering of stacked tabs for MD.

chrome/browser/ui/views/tabs/tab_unittest.cc

 // 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.
 
 #include "chrome/browser/ui/views/tabs/tab.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 21 matching lines @@
     paint_throbber_to_layer_ = value;
   }
 
   const ui::ListSelectionModel& GetSelectionModel() const override {
     return selection_model_;
   }
   bool SupportsMultipleSelection() override { return false; }
   bool ShouldHideCloseButtonForInactiveTabs() override {
     return false;
   }
+  bool MaySetClip() override { return false; }
   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 { return active_tab_; }
   bool IsTabSelected(const Tab* tab) const override { return false; }
   bool IsTabPinned(const Tab* tab) const override { return false; }
   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 { return false; }
   Tab* GetTabAt(Tab* tab, const gfx::Point& tab_in_tab_coordinates) override {
     return NULL;
   }
   void OnMouseEventInTab(views::View* source,
                          const ui::MouseEvent& event) override {}
-  bool ShouldPaintTab(const Tab* tab, gfx::Rect* clip) override { return true; }
+  bool ShouldPaintTab(
+      const Tab* tab,
+      const base::Callback<gfx::Path(const gfx::Size&)>& border_callback,
+      gfx::Path* clip) override {
+    return true;
+  }
   bool CanPaintThrobberToLayer() const override {
     return paint_throbber_to_layer_;
   }
   bool IsImmersiveStyle() const override { return immersive_style_; }
   SkColor GetToolbarTopSeparatorColor() const override { return SK_ColorBLACK; }
   int GetBackgroundResourceId(bool* custom_image) const override {
     *custom_image = false;
     return IDR_THEME_TAB_BACKGROUND;
   }
   void UpdateTabAccessibilityState(const Tab* tab,
@@ skipping 407 matching lines @@
 }
 
 TEST_F(TabTest, TitleHiddenWhenSmall) {
   FakeTabController tab_controller;
   Tab tab(&tab_controller, nullptr);
   tab.SetBounds(0, 0, 100, 50);
   EXPECT_GT(GetTitleWidth(tab), 0);
   tab.SetBounds(0, 0, 0, 50);
   EXPECT_EQ(0, GetTitleWidth(tab));
 }