Enable display zoom slider by default

This patch moves the flag base for enable display zoom slider from a
switch to a feature and enables it by default.

Bug: 790723,835030
Change-Id: I1b5ed5adac4febd1a0ca7a1aff36d5ac4e691b54
Component: display switches, chromeos switches, settings ui
Reviewed-on: https://chromium-review.googlesource.com/1018145
Reviewed-by: Steven Bennetts <[email protected]>
Reviewed-by: Mitsuru Oshima <[email protected]>
Cr-Commit-Position: refs/heads/master@{#552207}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index dea29a0..eeb7eaf 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -3704,7 +3704,7 @@
     {"enable-display-zoom-setting",
      flag_descriptions::kEnableDisplayZoomSettingName,
      flag_descriptions::kEnableDisplayZoomSettingDescription, kOsCrOS,
-     SINGLE_VALUE_TYPE(chromeos::switches::kEnableDisplayZoomSetting)},
+     FEATURE_VALUE_TYPE(features::kEnableDisplayZoomSetting)},
 
     {"ash-enable-new-overview-ui",
      flag_descriptions::kAshEnableNewOverviewUiName,