Add triggering for IPH_TabGroupsQuicklyComparePages

Enable triggering of IPH_TabGroupsQuicklyComparePages when tab groups
feature is enabled.

Bug: 930970
Change-Id: I9182bb3ebe40c00d9dd03f7eb234bde4f1d800c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1497638
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Auto-Submit: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638416}

chrome/android/java/src/org/chromium/chrome/browser/tasks/tab_list_ui/BottomTabGridCoordinator.java

@@ -4,14 +4,18 @@
 
 package org.chromium.chrome.browser.tasks.tab_list_ui;
 
+import android.app.Activity;
 import android.content.Context;
 
+import org.chromium.base.ApplicationStatus;
+import org.chromium.chrome.browser.ChromeTabbedActivity;
 import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
 import org.chromium.chrome.browser.dependency_injection.ActivityScope;
 import org.chromium.chrome.browser.lifecycle.Destroyable;
 import org.chromium.chrome.browser.tabmodel.TabCreatorManager;
 import org.chromium.chrome.browser.tabmodel.TabModel;
 import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.chrome.browser.tasks.tab_groups.TabGroupUtils;
 import org.chromium.chrome.browser.widget.bottomsheet.BottomSheetController;
 import org.chromium.ui.modelutil.PropertyModel;
 
@@ -42,6 +46,7 @@ public class BottomTabGridCoordinator implements Destroyable {
         mMediator =
                 new BottomTabGridMediator(mContext, bottomSheetController, this::resetWithTabModel,
                         mToolbarPropertyModel, tabModelSelector, tabCreatorManager);
+        startObservingForCreationIPH();
     }
 
     /**
@@ -89,4 +94,12 @@ public class BottomTabGridCoordinator implements Destroyable {
             }
         }
     }
+
+    private void startObservingForCreationIPH() {
+        Activity activity = ApplicationStatus.getLastTrackedFocusedActivity();
+        if (!(activity instanceof ChromeTabbedActivity)) return;
+
+        TabGroupUtils.startObservingForTabGroupsIPH(
+                ((ChromeTabbedActivity) activity).getTabModelSelector());
+    }
 }