[TTS] Add some initial signals for Tap in content.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchUma.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchUma.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchUma.java
index b1acdc6183018c7b86a0e7d97431344f19295235..a686b9cb1bcb00a8b7262951b316582c9293a874 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchUma.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchUma.java
@@ -803,6 +803,50 @@ public class ContextualSearchUma {
     }
 
     /**
+     * Log whether results were seen due to a Tap that may have been near the edge of a word.
+     * @param wasSearchContentViewSeen If the panel was opened.
+     * @param isNearWordEdge Whether this tap was near the edge of a word.
+     */
+    public static void logTapWordEdgeSeen(
+            boolean wasSearchContentViewSeen, boolean isNearWordEdge) {
+        if (!isNearWordEdge) {
+            // We just record CTR of words tapped in the "middle".
+            RecordHistogram.recordEnumeratedHistogram("Search.ContextualSearchNotNearWordEdgeSeen",
+                    wasSearchContentViewSeen ? RESULTS_SEEN : RESULTS_NOT_SEEN,
+                    RESULTS_SEEN_BOUNDARY);
+        }
+    }
+
+    /**
+     * Log whether results were seen due to a Tap on a short word.
+     * @param wasSearchContentViewSeen If the panel was opened.
+     * @param isShortWord Whether this tap was on a "short" word.
+     */
+    public static void logTapShortWordSeen(boolean wasSearchContentViewSeen, boolean isShortWord) {
+        if (isShortWord) {
+            // We just record CTR of short words.
+            RecordHistogram.recordEnumeratedHistogram("Search.ContextualSearchShortWordSeen",
+                    wasSearchContentViewSeen ? RESULTS_SEEN : RESULTS_NOT_SEEN,
+                    RESULTS_SEEN_BOUNDARY);
+        }
+    }
+
+    /**
+     * Log whether results were seen due to a Tap on a word considered not "long enough".
+     * @param wasSearchContentViewSeen If the panel was opened.
+     * @param isWordNotLongEnough Whether this tap was on a word that wasn't quite long.
+     */
+    public static void logTapWordNotLongEnoughSeen(
+            boolean wasSearchContentViewSeen, boolean isWordNotLongEnough) {
+        if (!isWordNotLongEnough) {
+            // We just record CTR of long words.
+            RecordHistogram.recordEnumeratedHistogram("Search.ContextualSearchLongWordSeen",
+                    wasSearchContentViewSeen ? RESULTS_SEEN : RESULTS_NOT_SEEN,
+                    RESULTS_SEEN_BOUNDARY);
+        }
+    }
+
+    /**
      * Logs whether results were seen and whether any tap suppression heuristics were satisfied.
      * @param wasSearchContentViewSeen If the panel was opened.
      * @param wasAnySuppressionHeuristicSatisfied Whether any of the implemented suppression