[TTS] Add onTouchDown to GestureStateListener.

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 a49e129aa9ffb728d9fbddfe39ccd5e3a9bef1d0..52069708aeef0894647b7b18b41bde207f435cdf 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
@@ -802,6 +802,44 @@ public class ContextualSearchUma {
         }
     }
 
+    /**
+     * Logs whether results were seen based on the duration of the Tap, for both short and long
+     * durations.
+     * @param wasSearchContentViewSeen If the panel was opened.
+     * @param isTapShort Whether this tap was "short" in duration.
+     */
+    public static void logTapDurationSeen(boolean wasSearchContentViewSeen, boolean isTapShort) {
+        if (isTapShort) {
+            RecordHistogram.recordEnumeratedHistogram("Search.ContextualSearchTapShortDurationSeen",
+                    wasSearchContentViewSeen ? RESULTS_SEEN : RESULTS_NOT_SEEN,
+                    RESULTS_SEEN_BOUNDARY);
+        } else {
+            RecordHistogram.recordEnumeratedHistogram("Search.ContextualSearchTapLongDurationSeen",
+                    wasSearchContentViewSeen ? RESULTS_SEEN : RESULTS_NOT_SEEN,
+                    RESULTS_SEEN_BOUNDARY);
+        }
+    }
+
+    /**
+     * Logs the duration of a Tap in ms into custom histograms to profile the duration of seen
+     * and not seen taps.
+     * @param wasPanelSeen Whether the panel was seen.
+     * @param durationMs The duration of the tap gesture.
+     */
+    public static void logTapDuration(boolean wasPanelSeen, int durationMs) {
+        int min = 1;
+        int max = 1000;
+        int numBuckets = 100;
+
+        if (wasPanelSeen) {
+            RecordHistogram.recordCustomCountHistogram(
+                    "Search.ContextualSearchTapDurationSeen", durationMs, min, max, numBuckets);
+        } else {
+            RecordHistogram.recordCustomCountHistogram(
+                    "Search.ContextualSearchTapDurationNotSeen", durationMs, min, max, numBuckets);
+        }
+    }
+
     /**
      * Log whether results were seen due to a Tap on a short word.
      * @param wasSearchContentViewSeen If the panel was opened.