Add ink drop highlight for hover and focus on location icons (e.g. star,

chrome/browser/ui/views/location_bar/icon_label_bubble_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/icon_label_bubble_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/layout_constants.h"
 #include "chrome/browser/ui/views/location_bar/background_with_1_px_border.h"
 #include "ui/base/material_design/material_design_controller.h"
@@ skipping 189 matching lines @@
   InkDropHostView::AddInkDropLayer(ink_drop_layer);
 }
 
 void IconLabelBubbleView::RemoveInkDropLayer(ui::Layer* ink_drop_layer) {
   InkDropHostView::RemoveInkDropLayer(ink_drop_layer);
   image()->SetPaintToLayer(false);
 }
 
 std::unique_ptr<views::InkDropHighlight>
 IconLabelBubbleView::CreateInkDropHighlight() const {
-  // Location bar views don't show hover effect.
-  return nullptr;
+  // Only show a highlight effect when the label is empty/invisible.
+  return label()->visible() ? nullptr
+                            : InkDropHostView::CreateInkDropHighlight();
 }
 
 SkColor IconLabelBubbleView::GetInkDropBaseColor() const {
   return color_utils::DeriveDefaultIconColor(GetTextColor());
 }
 
 SkColor IconLabelBubbleView::GetParentBackgroundColor() const {
   return ui::MaterialDesignController::IsModeMaterial()
              ? GetNativeTheme()->GetSystemColor(
                    ui::NativeTheme::kColorId_TextfieldDefaultBackground)
@@ skipping 106 matching lines @@
     // Draw the 1 px separator.
     gfx::ScopedCanvas scoped_canvas(canvas);
     const float scale = canvas->UndoDeviceScaleFactor();
     // Keep the separator aligned on a pixel center.
     const gfx::RectF pixel_aligned_bounds =
         gfx::ScaleRect(gfx::RectF(bounds), scale) - gfx::Vector2dF(0.5f, 0);
     canvas->DrawLine(pixel_aligned_bounds.top_right(),
                      pixel_aligned_bounds.bottom_right(), separator_color);
   }
 }