Fix download shelf visibility bug introduced by nullptr change.

chrome/browser/ui/views/frame/browser_view.cc

 // Copyright 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/frame/browser_view.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 1197 matching lines @@
   // This can be called from the superclass destructor, when it destroys our
   // child views. At that point, browser_ is already gone.
   if (!browser_)
     return;
 
   if (visible && IsDownloadShelfVisible() != visible) {
     // Invoke GetDownloadShelf to force the shelf to be created.
     GetDownloadShelf();
   }
 
-  if (!browser_)
-    browser_->UpdateDownloadShelfVisibility(visible);
+  browser_->UpdateDownloadShelfVisibility(visible);
 
   // SetDownloadShelfVisible can force-close the shelf, so make sure we lay out
   // everything correctly, as if the animation had finished. This doesn't
   // matter for showing the shelf, as the show animation will do it.
   ToolbarSizeChanged(false);
 }
 
 bool BrowserView::IsDownloadShelfVisible() const {
   return download_shelf_.get() && download_shelf_->IsShowing();
 }
@@ skipping 1275 matching lines @@
       !GetLocationBar()->GetOmniboxView()->model()->popup_model()->IsOpen()) {
     gfx::Point icon_bottom(
         toolbar_->location_bar()->GetLocationBarAnchorPoint());
     ConvertPointToTarget(toolbar_->location_bar(), this, &icon_bottom);
     gfx::Point infobar_top(0, infobar_container_->GetVerticalOverlap(nullptr));
     ConvertPointToTarget(infobar_container_, this, &infobar_top);
     top_arrow_height = infobar_top.y() - icon_bottom.y();
   }
   return top_arrow_height;
 }