[TTS] Write initial Tap-features to Ranker.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
index dd6eea464a51b0cb60e8fc6aa9a1773953ee45f8..db5262a3bd1952bd8b2c7fa3203c46d01dda1784 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
@@ -58,6 +58,9 @@ public class ContextualSearchFieldTrial {
 
     private static final String DISABLE_AMP_AS_SEPARATE_TAB = "disable_amp_as_separate_tab";
 
+    // Machine Learning
+    private static final String ENABLE_RANKER_LOGGING = "enable_ranker_logging";
+
     // Privacy-related flags
     private static final String DISABLE_SEND_HOME_COUNTRY = "disable_send_home_country";
     private static final String DISABLE_PAGE_CONTENT_NOTIFICATION =
@@ -82,6 +85,7 @@ public class ContextualSearchFieldTrial {
     private static Boolean sIsSendHomeCountryDisabled;
     private static Boolean sIsPageContentNotificationDisabled;
     private static Boolean sContextualSearchUrlActionsEnabled;
+    private static Boolean sIsRankerLoggingEnabled;
 
     /**
      * Don't instantiate.
@@ -301,6 +305,17 @@ public class ContextualSearchFieldTrial {
         return sIsPageContentNotificationDisabled.booleanValue();
     }
 
+    /**
+     * @return Whether or not logging to Ranker is enabled.
+     */
+    static boolean isRankerLoggingEnabled() {
+        if (sIsRankerLoggingEnabled == null) {
+            sIsRankerLoggingEnabled = getBooleanParam(ENABLE_RANKER_LOGGING);
+        }
+
+        return sIsRankerLoggingEnabled;
+    }
+
     // ---------------
     // Features.
     // ---------------