Move ZoomObserver, ZoomController and ZoomEventManager to components/.

components/ui_zoom.gypi

 # 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.
 
 {
   'targets': [
     {
-      # GN version: //components/url_fixer
-      'target_name': 'url_fixer',
+      'target_name': 'ui_zoom',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
+        '../content/content.gyp:content_browser',
+        '../content/content.gyp:content_common',
+        '../ipc/ipc.gyp:ipc',
         '../net/net.gyp:net',
+        '../url/url.gyp:url_lib',
       ],
       'sources': [
-        # Note: sources list duplicated in GN build.
-        'url_fixer/url_fixer.cc',
-        'url_fixer/url_fixer.h',
+        'ui/zoom/zoom_controller.cc',
+        'ui/zoom/zoom_controller.h',
+        'ui/zoom/zoom_event_manager.cc',
+        'ui/zoom/zoom_event_manager.h',
+        'ui/zoom/zoom_observer.h'
       ],
-      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-      'msvs_disabled_warnings': [4267, ],
-    },
+    }
   ],
 }