[Extensions UI] Highlight toolbar extensions when the redesign bubble is active

chrome/browser/ui/views/toolbar/toolbar_action_view_unittest.cc

 // Copyright 2015 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 "base/run_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/ui/toolbar/test_toolbar_action_view_controller.h"
 #include "chrome/browser/ui/toolbar/toolbar_action_view_controller.h"
@@ skipping 17 matching lines @@
 
   // ToolbarActionView::Delegate:
   content::WebContents* GetCurrentWebContents() override {
     return web_contents_;
   }
   bool ShownInsideMenu() const override { return shown_in_menu_; }
   void OnToolbarActionViewDragDone() override {}
   views::MenuButton* GetOverflowReferenceView() override {
     return overflow_reference_view_;
   }
+  void OnMouseEnteredToolbarActionView() override {}
   void WriteDragDataForView(views::View* sender,
                             const gfx::Point& press_pt,
                             ui::OSExchangeData* data) override {}
   int GetDragOperationsForView(views::View* sender,
                                const gfx::Point& p) override {
     return ui::DragDropTypes::DRAG_NONE;
   }
   bool CanStartDragForView(views::View* sender,
                            const gfx::Point& press_pt,
                            const gfx::Point& p) override { return false; }
@@ skipping 175 matching lines @@
   // If the view isn't visible, the overflow button should be pressed for
   // popups.
   view.SetVisible(false);
   controller.ShowPopup(true);
   EXPECT_EQ(views::Button::STATE_NORMAL, view.state());
   EXPECT_EQ(views::Button::STATE_PRESSED, overflow_button.state());
   controller.HidePopup();
   EXPECT_EQ(views::Button::STATE_NORMAL, view.state());
   EXPECT_EQ(views::Button::STATE_NORMAL, overflow_button.state());
 }