Make keyword hint view ("press tab to search foo.com") clickable.

chrome/browser/ui/views/location_bar/keyword_hint_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/keyword_hint_view.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 36 matching lines @@
 gfx::Size TabKeyBubbleView::GetPreferredSize() const {
   gfx::Size size = views::Label::GetPreferredSize();
   constexpr int kPaddingInsideBorder = 5;
   // Even though the border is 1 px thick visibly, it takes 1 DIP logically.
   size.Enlarge(2 * (kPaddingInsideBorder + 1), 0);
   return size;
 }
 
 }  // namespace
 
-KeywordHintView::KeywordHintView(Profile* profile,
+KeywordHintView::KeywordHintView(views::ButtonListener* listener,
+                                 Profile* profile,
                                  const gfx::FontList& font_list,
                                  const gfx::FontList& bubble_font_list,
                                  int bubble_height,
                                  SkColor text_color,
                                  SkColor background_color)
-    : profile_(profile),
+    : CustomButton(listener),
+      profile_(profile),
       leading_label_(nullptr),
       tab_key_view_(nullptr),
       trailing_label_(nullptr),
       tab_key_height_(bubble_height) {
   leading_label_ =
       CreateLabel(font_list, text_color, background_color);
   TabKeyBubbleView* tab_key = new TabKeyBubbleView(bubble_font_list);
   tab_key->SetEnabledColor(text_color);
   bool inverted = color_utils::IsDark(background_color);
   SkColor tab_bg_color =
@@ skipping 69 matching lines @@
 
 views::Label* KeywordHintView::CreateLabel(const gfx::FontList& font_list,
                                            SkColor text_color,
                                            SkColor background_color) {
   views::Label* label = new views::Label(base::string16(), {font_list});
   label->SetEnabledColor(text_color);
   label->SetBackgroundColor(background_color);
   AddChildView(label);
   return label;
 }