Refactor to move chrome_page_zoom functions to components/ui/zoom.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 811 matching lines @@
       'browser/bookmarks/bookmark_html_writer.cc',
       'browser/bookmarks/bookmark_html_writer.h',
       'browser/certificate_viewer.cc',
       'browser/certificate_viewer.h',
       'browser/chrome_browser_field_trials_desktop.cc',
       'browser/chrome_browser_field_trials_desktop.h',
       'browser/chrome_browser_main_posix.cc',
       'browser/chrome_browser_main_posix.h',
       'browser/chrome_device_client.cc',
       'browser/chrome_device_client.h',
-      'browser/chrome_page_zoom.cc',
-      'browser/chrome_page_zoom.h',
-      'browser/chrome_page_zoom_constants.cc',
-      'browser/chrome_page_zoom_constants.h',
       'browser/chrome_process_singleton.cc',
       'browser/chrome_process_singleton.h',
       'browser/component_updater/widevine_cdm_component_installer.cc',
       'browser/component_updater/widevine_cdm_component_installer.h',
       'browser/custom_home_pages_table_model.cc',
       'browser/custom_home_pages_table_model.h',
       'browser/diagnostics/diagnostics_controller.cc',
       'browser/diagnostics/diagnostics_controller.h',
       'browser/diagnostics/diagnostics_metrics.cc',
       'browser/diagnostics/diagnostics_metrics.h',
@@ skipping 2876 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }