Removing Variations support for google_update_experiment_id.

components/variations/variations_associated_data.cc

Index: components/variations/variations_associated_data.cc
diff --git a/components/variations/variations_associated_data.cc b/components/variations/variations_associated_data.cc
index d257d01999f0619e18ee76ff39a294e4b166bd1a..508f952dd266da236a6cbdb108f35498070b5d47 100644
--- a/components/variations/variations_associated_data.cc
+++ b/components/variations/variations_associated_data.cc
@@ -38,7 +38,7 @@ class GroupMapAccessor {
                    const VariationID id,
                    const bool force) {
 #if !defined(NDEBUG)
-    DCHECK_EQ(4, ID_COLLECTION_COUNT);
+    DCHECK_EQ(3, ID_COLLECTION_COUNT);
     // Ensure that at most one of the trigger/non-trigger web property IDs are
     // set.
     if (key == GOOGLE_WEB_PROPERTIES || key == GOOGLE_WEB_PROPERTIES_TRIGGER) {