[TTS] Record CTR by week and 28-day intervals.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapSuppressionHeuristics.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapSuppressionHeuristics.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapSuppressionHeuristics.java
index 1e8030cfdfd61e9b6d006244cc0ea7c3c8964142..e182cb585e05b2fd71352041b683882c561c78b7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapSuppressionHeuristics.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapSuppressionHeuristics.java
@@ -8,6 +8,8 @@ package org.chromium.chrome.browser.contextualsearch;
  * A set of {@link ContextualSearchHeuristic}s that support experimentation and logging.
  */
 public class TapSuppressionHeuristics extends ContextualSearchHeuristics {
+    private CTRRecorder mCtrRecorder;
+
     /**
      * Gets all the heuristics needed for Tap suppression.
      * @param selectionController The {@link ContextualSearchSelectionController}.
@@ -19,6 +21,8 @@ public class TapSuppressionHeuristics extends ContextualSearchHeuristics {
     TapSuppressionHeuristics(ContextualSearchSelectionController selectionController,
             ContextualSearchTapState previousTapState, int x, int y, int tapsSinceOpen) {
         super();
+        mCtrRecorder = new CTRRecorder(selectionController.getActivity());
+        mHeuristics.add(mCtrRecorder);
         RecentScrollTapSuppression scrollTapExperiment =
                 new RecentScrollTapSuppression(selectionController);
         mHeuristics.add(scrollTapExperiment);
@@ -38,6 +42,17 @@ public class TapSuppressionHeuristics extends ContextualSearchHeuristics {
     }
 
     /**
+     * This method should be called to clean up storage when an instance of this class is
+     * no longer in use.
+     */
+    public void destroy() {
+        if (mCtrRecorder != null) {
+            mCtrRecorder.destroy();
+            mCtrRecorder = null;
+        }
+    }
+
+    /**
      * Logs the results seen for the heuristics and whether they would have had their condition
      * satisfied if enabled.
      * @param wasSearchContentViewSeen Whether the panel contents were seen.