Adding flag to chrome://flags for snippets only.

Bug: 1013795
Change-Id: I1a0db4a62fee2ba9c014daa6780c4e118da1d3b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1857638Reviewed-by: Dan H <harringtond@chromium.org>
Commit-Queue: Jonathan Freed <freedjm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708026}

chrome/browser/about_flags.cc

@@ -596,15 +596,20 @@ const FeatureEntry::FeatureParam
     kInterestFeedLargerImagesFeatureVariationConstant[] = {
         {"feed_ui_enabled", "true"}};
 const FeatureEntry::FeatureParam
-    kInterestFeedSnippetsEnabledFeatureVariationConstant[] = {
+    kInterestFeedSnippetsFeatureVariationConstant[] = {
+        {"snippets_enabled", "true"}};
+const FeatureEntry::FeatureParam
+    kInterestFeedLargeImagesAndSnippetsFeatureVariationConstant[] = {
         {"feed_ui_enabled", "true"},
         {"snippets_enabled", "true"}};
 const FeatureEntry::FeatureVariation kInterestFeedFeatureVariations[] = {
     {"(larger images)", kInterestFeedLargerImagesFeatureVariationConstant,
      base::size(kInterestFeedLargerImagesFeatureVariationConstant), nullptr},
+    {"(snippets)", kInterestFeedSnippetsFeatureVariationConstant,
+     base::size(kInterestFeedSnippetsFeatureVariationConstant), nullptr},
     {"(larger images and snippets)",
-     kInterestFeedSnippetsEnabledFeatureVariationConstant,
-     base::size(kInterestFeedSnippetsEnabledFeatureVariationConstant),
+     kInterestFeedLargeImagesAndSnippetsFeatureVariationConstant,
+     base::size(kInterestFeedLargeImagesAndSnippetsFeatureVariationConstant),
      nullptr}};
 
 const FeatureEntry::FeatureVariation kRemoteSuggestionsFeatureVariations[] = {