[TTS] Add Event to In-Product Help for Contextual Search

Add new event to In-Product Help for Contextual Search that records each time the
user clicks on the Web Search option from the popup menu.

Bug: 771750
Change-Id: Ib29134ba4135828c76dc24348535536b7f14d18a
Reviewed-on: https://chromium-review.googlesource.com/713743
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Reviewed-by: Donn Denman <donnd@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510256}

chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java

@@ -13,12 +13,14 @@ import android.view.MenuItem;
 import org.chromium.base.Callback;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordUserAction;
+import org.chromium.chrome.browser.feature_engagement.TrackerFactory;
 import org.chromium.chrome.browser.firstrun.FirstRunStatus;
 import org.chromium.chrome.browser.locale.LocaleManager;
 import org.chromium.chrome.browser.omnibox.geo.GeolocationHeader;
 import org.chromium.chrome.browser.search_engines.TemplateUrlService;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.components.feature_engagement.EventConstants;
 import org.chromium.content.R;
 import org.chromium.content_public.browser.ActionModeCallbackHelper;
 import org.chromium.content_public.browser.LoadUrlParams;
@@ -112,6 +114,8 @@ public class ChromeActionModeCallback implements ActionMode.Callback {
                 searchText, ActionModeCallbackHelper.MAX_SEARCH_QUERY_LENGTH);
         if (TextUtils.isEmpty(query)) return;
 
+        TrackerFactory.getTrackerForProfile(mTab.getProfile())
+                .notifyEvent(EventConstants.WEB_SEARCH_PERFORMED);
         mTab.getTabModelSelector().openNewTab(generateUrlParamsForSearch(query),
                 TabLaunchType.FROM_LONGPRESS_FOREGROUND, mTab, mTab.isIncognito());
     }

components/feature_engagement/public/android/java/src/org/chromium/components/feature_engagement/EventConstants.java

@@ -75,6 +75,11 @@ public final class EventConstants {
      */
     public static final String CONTEXTUAL_SEARCH_PANEL_OPENED = "contextual_search_panel_opened";
 
+    /**
+     * User performed a web search for a query by choosing the Web Search option on the popup menu.
+     */
+    public static final String WEB_SEARCH_PERFORMED = "web_search_performed";
+
     /**
      * Contextual Search showed an entity result for the searched query.
      */