Moved all feature documentation comments to header file

Change-Id: Ifc9ec865d8046bc11e0cf6c22a1a33d2dfb349d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2565735Reviewed-by: Dan H <harringtond@chromium.org>
Commit-Queue: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832349}

components/feed/feed_feature_list.cc

@@ -33,10 +33,6 @@ const base::FeatureParam<bool> kOnlySetLastRefreshAttemptOnSuccess{
 const base::Feature kReportFeedUserActions{"ReportFeedUserActions",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Determines whether conditions should be reached before enabling the upload of
-// click and view actions in the feed (e.g., the user needs to view X cards).
-// For example, This is needed when the notice card is at the second position in
-// the feed.
 const base::Feature kInterestFeedV1ClicksAndViewsConditionalUpload{
     "InterestFeedV1ClickAndViewActionsConditionalUpload",
     base::FEATURE_DISABLED_BY_DEFAULT};
@@ -44,12 +40,9 @@ const base::Feature kInterestFeedV2ClicksAndViewsConditionalUpload{
     "InterestFeedV2ClickAndViewActionsConditionalUpload",
     base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Feature that allows the client to automatically dismiss the notice card based
-// on the clicks and views on the notice card.
 const base::Feature kInterestFeedNoticeCardAutoDismiss{
     "InterestFeedNoticeCardAutoDismiss", base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Used for A:B testing of a bug fix (crbug.com/1151391).
 const base::Feature kInterestFeedSpinnerAlwaysAnimate{
     "InterestFeedSpinnerAlwaysAnimate", base::FEATURE_DISABLED_BY_DEFAULT};
 

components/feed/feed_feature_list.h

@@ -28,11 +28,18 @@ extern const base::FeatureParam<bool> kOnlySetLastRefreshAttemptOnSuccess;
 // for personalization. Also enables the feed header menu to manage the feed.
 extern const base::Feature kReportFeedUserActions;
 
+// Determines whether conditions should be reached before enabling the upload of
+// click and view actions in the feed (e.g., the user needs to view X cards).
+// For example, this is needed when the notice card is at the second position in
+// the feed.
 extern const base::Feature kInterestFeedV1ClicksAndViewsConditionalUpload;
 extern const base::Feature kInterestFeedV2ClicksAndViewsConditionalUpload;
 
+// Feature that allows the client to automatically dismiss the notice card based
+// on the clicks and views on the notice card.
 extern const base::Feature kInterestFeedNoticeCardAutoDismiss;
 
+// Used for A:B testing of a bug fix (crbug.com/1151391).
 extern const base::Feature kInterestFeedSpinnerAlwaysAnimate;
 
 // Feature that allows users to keep up with and consume web content.