Move ZoomObserver, ZoomController and ZoomEventManager to components/.

chrome/browser/ui/zoom/chrome_zoom_level_otr_delegate.cc

 // Copyright 2014 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/zoom/chrome_zoom_level_otr_delegate.h"
 
 #include "base/bind.h"
-#include "chrome/browser/ui/zoom/zoom_event_manager.h"
+#include "components/ui/zoom/zoom_event_manager.h"
 
 namespace chrome {
 
 ChromeZoomLevelOTRDelegate::ChromeZoomLevelOTRDelegate(
-      base::WeakPtr<ZoomEventManager> zoom_event_manager)
-  : zoom_event_manager_(zoom_event_manager),
-    host_zoom_map_(nullptr) {
+    base::WeakPtr<ui_zoom::ZoomEventManager> zoom_event_manager)
+    : zoom_event_manager_(zoom_event_manager), host_zoom_map_(nullptr) {
 }
 
 ChromeZoomLevelOTRDelegate::~ChromeZoomLevelOTRDelegate() {
 }
 
 void ChromeZoomLevelOTRDelegate::InitHostZoomMap(
     content::HostZoomMap* host_zoom_map) {
   // This init function must be called only once.
   DCHECK(!host_zoom_map_);
   DCHECK(host_zoom_map);
   host_zoom_map_ = host_zoom_map;
 
   zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(base::Bind(
       &ChromeZoomLevelOTRDelegate::OnZoomLevelChanged, base::Unretained(this)));
 }
 
 void ChromeZoomLevelOTRDelegate::OnZoomLevelChanged(
     const content::HostZoomMap::ZoomLevelChange& change) {
   // If there's a manager to aggregate ZoomLevelChanged events, pass this event
   // along. Since we already hold a subscription to our associated HostZoomMap,
   // we don't need to create a separate subscription for this.
   if (zoom_event_manager_)
     zoom_event_manager_->OnZoomLevelChanged(change);
 }
 
 }  // namespace chrome