Remove EditableLinkBehavior, which is always set to NeverLive by Chromium.

Source/core/frame/Settings.in

 # Defines properties which are available on the Settings object.
 #
 # Please think carefully before adding a new Setting.  Some questions to
 # consider are:
 # - Should this be a RuntimeEnabledFeature instead? Settings are for things
 #   which we support either values of at runtime.  Features are set at renderer
 #   process startup and are never changed. Features also tend to be set to a
 #   value based on the platform or the stability of the code in question, where
 #   as settings both codepaths need to be stable.
 # - How will you ensure test coverage of all relevant values of your setting?
 # - Is the default value appropriate for other platforms or ports which may
 #   not be aware of your setting?
 # - Can your setting result in behavior differences observable to web
 #   developers?
 # - Should this setting ideally be removed in the future?  If so please file
 #   a bug and reference it in the comments for your setting.
 #
 # One reason to add a Setting is to manage the risk associated with adding a
 # new feature.  For example, we may choose to ship a new UI behavior or
 # performance optimization to ChromeOS users first (in order to gather feedback
 # and metrics on its use from the wild) before attempting to ship it to
 # Windows.
 #
 # FIXME: Add support for global settings.
 # FIXME: Add support for custom getters/setters.
 
 defaultTextEncodingName type=String
-editableLinkBehavior type=EditableLinkBehavior, initial=EditableLinkDefaultBehavior
 
 # Do not hide chars typed in password fields immediately, but let the last char stay
 # visible for N seconds, configured by the passwordEchoDurationInSeconds setting
 # FIXME: Enable automatically if passwordEchoDurationInSeconds is set to a positive value.
 passwordEchoEnabled initial=false
 
 # Configure how long the last char should say visible in seconds.
 passwordEchoDurationInSeconds type=double, initial=1
 
 # Sets the magnification value for validation message timer.  If the
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 # Clients that execute script should call ScriptController::canExecuteScripts()
 # instead of this function. ScriptController::canExecuteScripts() checks the
 # HTML sandbox, plug-in sandboxing, and other important details.
 scriptEnabled initial=false, invalidate=ScriptEnable
 
 # Compensates for poor text legibility on mobile devices. This value is
 # multiplied by the font scale factor when performing text autosizing of
 # websites that do not set an explicit viewport description.
 deviceScaleAdjustment type=double, initial=1.0, invalidate=TextAutosizing