Updates Zoom bubble layout and adds +/- buttons

chrome/browser/ui/views/location_bar/zoom_view.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/location_bar/zoom_view.h"
 
 #include "base/i18n/number_formatting.h"
 #include "chrome/app/vector_icons/vector_icons.h"
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/browser/ui/views/location_bar/zoom_bubble_view.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/toolbar/toolbar_model.h"
 #include "components/zoom/zoom_controller.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/events/event.h"
 #include "ui/gfx/geometry/size.h"
 
 ZoomView::ZoomView(LocationBarView::Delegate* location_bar_delegate)
     : BubbleIconView(nullptr, 0),
       location_bar_delegate_(location_bar_delegate),
       icon_(&kZoomMinusIcon) {
   Update(nullptr);
 }
 
 ZoomView::~ZoomView() {
 }
 
 void ZoomView::Update(zoom::ZoomController* zoom_controller) {
-  if (!zoom_controller || zoom_controller->IsAtDefaultZoom() ||
+  if (!zoom_controller ||
+      (!ZoomBubbleView::GetZoomBubble() &&
+       zoom_controller->IsAtDefaultZoom()) ||
       location_bar_delegate_->GetToolbarModel()->input_in_progress()) {
     SetVisible(false);
     ZoomBubbleView::CloseCurrentBubble();
     return;
   }
 
   SetTooltipText(l10n_util::GetStringFUTF16(
       IDS_TOOLTIP_ZOOM,
       base::FormatPercent(zoom_controller->GetZoomPercent())));
 
@@ skipping 18 matching lines @@
   node_data->SetName(l10n_util::GetStringUTF8(IDS_ACCNAME_ZOOM));
 }
 
 views::BubbleDialogDelegateView* ZoomView::GetBubble() const {
   return ZoomBubbleView::GetZoomBubble();
 }
 
 const gfx::VectorIcon& ZoomView::GetVectorIcon() const {
   return *icon_;
 }