Move ZoomObserver, ZoomController and ZoomEventManager to components/.

components/ui/zoom/zoom_event_manager.cc

Index: components/ui/zoom/zoom_event_manager.cc
diff --git a/chrome/browser/ui/zoom/zoom_event_manager.cc b/components/ui/zoom/zoom_event_manager.cc
similarity index 88%
rename from chrome/browser/ui/zoom/zoom_event_manager.cc
rename to components/ui/zoom/zoom_event_manager.cc
index 348153282fc0193b9311bee23f6d3e9324bb9b38..72906271c58af47e0f452955345be60abb711bb4 100644
--- a/chrome/browser/ui/zoom/zoom_event_manager.cc
+++ b/components/ui/zoom/zoom_event_manager.cc
@@ -2,7 +2,7 @@
 // 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/zoom_event_manager.h"
+#include "components/ui/zoom/zoom_event_manager.h"
 
 #include "content/public/browser/browser_context.h"
 
@@ -10,6 +10,8 @@ namespace {
 static const char kBrowserZoomEventManager[] = "browser_zoom_event_manager";
 }
 
+namespace ui_zoom {
+
 ZoomEventManager* ZoomEventManager::GetForBrowserContext(
     content::BrowserContext* context) {
   if (!context->GetUserData(kBrowserZoomEventManager))
@@ -21,7 +23,8 @@ ZoomEventManager* ZoomEventManager::GetForBrowserContext(
 ZoomEventManager::ZoomEventManager() : weak_ptr_factory_(this) {
 }
 
-ZoomEventManager::~ZoomEventManager() {}
+ZoomEventManager::~ZoomEventManager() {
+}
 
 void ZoomEventManager::OnZoomLevelChanged(
     const content::HostZoomMap::ZoomLevelChange& change) {
@@ -33,3 +36,5 @@ ZoomEventManager::AddZoomLevelChangedCallback(
     const content::HostZoomMap::ZoomLevelChangedCallback& callback) {
   return zoom_level_changed_callbacks_.Add(callback);
 }
+
+}  // namespace ui_zoom