Remove variation_ids.h file.

Experiments reservation mechanism moved to server-side therefore variation_ids.h is removed as it is not necessary anymore.

BUG=416881

Review URL: https://codereview.chromium.org/533703002

Cr-Commit-Position: refs/heads/master@{#296273}

chrome/common/variations/uniformity_field_trials.cc

@@ -9,13 +9,27 @@
 #include "base/metrics/field_trial.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
-#include "chrome/common/variations/variation_ids.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace chrome_variations {
 
 namespace {
 
+const int MINIMIUM_ID = 3300000;
+
+const int UNIFORMITY_1_PERCENT_BASE  = MINIMIUM_ID;
+const int UNIFORMITY_1_PERCENT_LIMIT = UNIFORMITY_1_PERCENT_BASE + 100;
+const int UNIFORMITY_5_PERCENT_BASE  = UNIFORMITY_1_PERCENT_LIMIT;
+const int UNIFORMITY_5_PERCENT_LIMIT = UNIFORMITY_5_PERCENT_BASE + 20;
+const int UNIFORMITY_10_PERCENT_BASE  = UNIFORMITY_5_PERCENT_LIMIT;
+const int UNIFORMITY_10_PERCENT_LIMIT = UNIFORMITY_10_PERCENT_BASE + 10;
+const int UNIFORMITY_20_PERCENT_BASE  = UNIFORMITY_10_PERCENT_LIMIT;
+const int UNIFORMITY_20_PERCENT_LIMIT = UNIFORMITY_20_PERCENT_BASE + 5;
+const int UNIFORMITY_50_PERCENT_BASE  = UNIFORMITY_20_PERCENT_LIMIT;
+// A uniformity trial used to compare one-time-randomized and
+// session-randomized FieldTrials.
+const int UNIFORMITY_SESSION_RANDOMIZED_5_PERCENT_BASE  = 3300139;
+
 // Set up a uniformity field trial. |one_time_randomized| indicates if the
 // field trial is one-time randomized or session-randomized. |trial_name_string|
 // must contain a "%d" since the percentage of the group will be inserted in