Add VectorIconButton functionality to ImageButton.

chrome/browser/ui/views/tabs/tab.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/tabs/tab.h"
 
 #include <stddef.h>
 #include <limits>
 #include <utility>
 
@@ skipping 743 matching lines @@
 
 void Tab::AnimationCanceled(const gfx::Animation* animation) {
   SchedulePaint();
 }
 
 void Tab::AnimationEnded(const gfx::Animation* animation) {
   SchedulePaint();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Tab, views::ButtonListener overrides:
+// Tab, views::ImageButtonDelegate overrides:
 
 void Tab::ButtonPressed(views::Button* sender, const ui::Event& event) {
   if (!alert_indicator_button_ || !alert_indicator_button_->visible())
     content::RecordAction(UserMetricsAction("CloseTab_NoAlertIndicator"));
   else if (alert_indicator_button_->enabled())
     content::RecordAction(UserMetricsAction("CloseTab_MuteToggleAvailable"));
   else if (data_.alert_state == TabAlertState::AUDIO_PLAYING)
     content::RecordAction(UserMetricsAction("CloseTab_AudioIndicator"));
   else
     content::RecordAction(UserMetricsAction("CloseTab_RecordingIndicator"));
@@ skipping 711 matching lines @@
   gfx::Rect bounds = favicon_bounds_;
   if (bounds.IsEmpty())
     return;
 
   // Extends the area to the bottom when the crash animation is in progress.
   if (crash_icon_animation_->is_animating())
     bounds.set_height(height() - bounds.y());
   bounds.set_x(GetMirroredXForRect(bounds));
   SchedulePaintInRect(bounds);
 }