Add a flag to change when android's progress bar completes

third_party/WebKit/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?
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 textTrackTextColor type=String
 textTrackTextShadow type=String
 textTrackTextSize type=String
 
 # Margin for title-safe placement of cues with overscan, gives top and bottom margin size as
 # percentage of video element height (for horizontal text) into which cues will not be placed.
 textTrackMarginPercentage type=double, initial=0
 
 lowPriorityIframes initial=false
 
-mainResourceOnlyProgress initial=false
+progressBarCompletion type=ProgressBarCompletion, initial=ProgressBarCompletion::LoadEvent
 
 # Do we want to try to save screen real estate in the media player by hiding
 # the volume slider / mute button?
 preferHiddenVolumeControls initial=false
 
 # Whether to disallow network fetches for parser blocking scripts in the main
 # frame inserted via document.write, for users on slow connections.
 disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections initial=false
 
 # Whether to disallow network fetches for parser blocking scripts in the main
@@ skipping 14 matching lines @@
 
 # Ability to override the default 'passive' value in AddEventListenerOptions. This
 # is useful to demonstrate the power of passive event listeners. This can be removed
 # when there is greater adoption, interventions to force it on and associated devtools
 # to enable it have been shipped.
 passiveListenerDefault type=PassiveListenerDefault, initial=PassiveListenerDefault::False
 
 # Use default interpolation quality to scale bitmap images if quality is not determined
 # in other ways. This can help us writing reftests containing scaled images.
 useDefaultImageInterpolationQuality initial=false