Add kClipboardContentSetting feature flag for Async Clipboard.

This will be used to control the visibility of the Clipboard Content Setting (coming in a follow-up cl).

Bug: 677564
Change-Id: I80bfcac5b5312d657046b585d82b2e58bd7e315b
Reviewed-on: https://chromium-review.googlesource.com/758459
Commit-Queue: Gary Kacmarcik <[email protected]>
Reviewed-by: Raymes Khoury <[email protected]>
Cr-Commit-Position: refs/heads/master@{#516177}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 91262f9..1e46cd7 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -3569,6 +3569,11 @@
      SINGLE_DISABLE_VALUE_TYPE(ash::switches::kAshDisableLoginDimAndBlur)},
 #endif  // OS_CHROMEOS
 
+    {"clipboard-content-setting",
+     flag_descriptions::kClipboardContentSettingName,
+     flag_descriptions::kClipboardContentSettingDescription, kOsAll,
+     FEATURE_VALUE_TYPE(features::kClipboardContentSetting)},
+
 #if defined(OS_CHROMEOS)
     {"native-samba", flag_descriptions::kNativeSambaName,
      flag_descriptions::kNativeSambaDescription, kOsCrOS,