Get rid of some lingering MD-specific raster assets.

chrome/browser/ui/views/extensions/extension_installed_bubble_view.cc

 // Copyright 2013 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 <algorithm>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/user_metrics_action.h"
@@ skipping 112 matching lines @@
 
   views::View* reference_view = nullptr;
   switch (controller_->anchor_position()) {
     case ExtensionInstalledBubble::ANCHOR_BROWSER_ACTION: {
       BrowserActionsContainer* container =
           browser_view->GetToolbarView()->browser_actions();
       // Hitting this DCHECK means |ShouldShow| failed.
       DCHECK(!container->animating());
 
       reference_view = container->GetViewForId(controller_->extension()->id());
-      // If the view is not visible then it is in the chevron, so point the
-      // install bubble to the chevron instead. If this is an incognito window,
-      // both could be invisible.
-      if (!reference_view || !reference_view->visible()) {
-        reference_view = container->chevron();
-        if (!reference_view || !reference_view->visible())
-          reference_view = nullptr;  // fall back to app menu below.
-      }
       break;
     }
     case ExtensionInstalledBubble::ANCHOR_PAGE_ACTION: {
       LocationBarView* location_bar_view = browser_view->GetLocationBarView();
       ExtensionAction* page_action =
           extensions::ExtensionActionManager::Get(browser()->profile())
               ->GetPageAction(*controller_->extension());
       location_bar_view->SetPreviewEnabledPageAction(page_action,
                                                      true);  // preview_enabled
       reference_view = location_bar_view->GetPageActionView(page_action);
@@ skipping 209 matching lines @@
             ->browser_actions();
     return !container->animating();
   }
   return true;
 }
 
 // Implemented here to create the platform specific instance of the BubbleUi.
 std::unique_ptr<BubbleUi> ExtensionInstalledBubble::BuildBubbleUi() {
   return base::WrapUnique(new ExtensionInstalledBubbleUi(this));
 }