[TTS] Write initial Tap-features to Ranker.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchRankerLogger.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchRankerLogger.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchRankerLogger.java
index 5a000d8ede43c58854518a2a7ece8cb6655c0f7b..7668152b3e0c8440857fcb050fcbb0be451e2d17 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchRankerLogger.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchRankerLogger.java
@@ -4,6 +4,8 @@
 
 package org.chromium.chrome.browser.contextualsearch;
 
+import java.net.URL;
+
 /**
  * An interface for logging to UMA via Ranker.
  */
@@ -27,21 +29,31 @@ public interface ContextualSearchRankerLogger {
     }
 
     /**
-     * Logs a particular key/value pair.
+     * Sets up logging for the page with the given URL.
+     * This method must be called before calling {@link #log} or {@link #logOutcome}.
+     * @param basePageUrl The URL of the base page to log with Ranker.
+     */
+    void setupLoggingForPage(URL basePageUrl);
+
+    /**
+     * Logs a particular feature at inference time as a key/value pair.
      * @param feature The feature to log.
      * @param value The value to log, which is associated with the given key.
      */
     void log(Feature feature, Object value);
 
     /**
-     * Logs the final outcome value that indicates the ML label.
+     * Logs an outcome value at training time that indicates an ML label as a key/value pair.
+     * @param feature The feature to log.
      * @param value The outcome label value.
      */
-    void logOutcome(Object value);
+    void logOutcome(Feature feature, Object value);
 
     /**
      * Writes all the accumulated log entries and resets the logger so that future log calls
      * accumulate into a new record.
+     * After calling this method another call to {@link #setupLoggingForPage} is required before
+     * additional {@link #log} or {@link #logOutcome} calls.
      */
     void writeLogAndReset();
 }