Reserve 100 ids for webrtc use in its finch experiments.

chrome/common/variations/variation_ids.h

Index: chrome/common/variations/variation_ids.h
diff --git a/chrome/common/variations/variation_ids.h b/chrome/common/variations/variation_ids.h
index 8eb51e3a8de1eff73544d512decba61d1e9cbf2c..125e711ea2d5aa4a46c9c5dd93274472a181db3b 100644
--- a/chrome/common/variations/variation_ids.h
+++ b/chrome/common/variations/variation_ids.h
@@ -335,10 +335,16 @@ enum ReservedVariationID {
   IOS_PHONE_NTP_MODAL_DIALOG_CONTROL_1 = 3312376,
   IOS_PHONE_NTP_MODAL_DIALOG_CONTROL_2 = 3312377,
 
+  // Field trials can be queried directly from webrtc via webrtc::field_trial.
+  // Thus new trials are added without explicit CLs in chromium repository.
+  // This is the range of ids reserved for those trials.
+  WEBRTC_FIELD_TRIAL_RANGE_ID_MIN = 3312378,
+  WEBRTC_FIELD_TRIAL_RANGE_ID_MAX = 3312477,
+
   // NEXT ID: When adding new IDs, please add them above this section, starting
   // with the value of NEXT_ID, and updating NEXT_ID to (end of your reserved
   // range) + 1.
-  NEXT_ID = 3312378,
+  NEXT_ID = 3312478,
 
   // USABLE IDs END HERE.
   //