Shows snackbar in translate infobar, after certain user actions.

chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java
index 236c9c93d87c9edf251beec7f9fdfcc02a108f81..3e8afafbdb45f0a6431e69dcb237f4a7e4e71597 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java
@@ -4,6 +4,7 @@
 
 package org.chromium.chrome.browser.infobar;
 
+import android.app.Activity;
 import android.content.Context;
 import android.view.Gravity;
 import android.view.View;
@@ -14,7 +15,9 @@ import org.chromium.base.ObserverList;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.banners.SwipableOverlayView;
+import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.tab.EmptyTabObserver;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabObserver;
@@ -151,11 +154,19 @@ public class InfoBarContainer extends SwipableOverlayView {
     private final ObserverList<InfoBarContainerObserver> mObservers =
             new ObserverList<InfoBarContainerObserver>();
 
+    /** The snackbar manager instance used by the activity that hosts this infobar. */
+    private SnackbarManager mSnackbarManager;
+
     public InfoBarContainer(Context context, final ViewGroup parentView, Tab tab) {
         super(context, null);
         tab.addObserver(mTabObserver);
         mTabView = tab.getView();
 
+        Activity activity = tab.getActivity();
+        if (activity != null && activity instanceof ChromeActivity) {
+            mSnackbarManager = ((ChromeActivity) activity).getSnackbarManager();
+        }

[gone, 2017/04/26 17:27:02]

This won't work if the tab is sent to another Activity (via "reparenting"). 
You'll probably have to (at least) listen to onReparentingFinished() in
mTabObserver.

[ramyasharma, 2017/04/27 08:03:11]

Thanks done. How can I test re-parenting from the UI? I am not sure what exactly
re-parenting means?

[gone, 2017/04/27 18:48:57]

Re-parenting currently moves a tab from a CustomTabActivity and makes it owned
by a ChromeTabbedActivity (with an entirely different set of UI).

You can test this by doing something like:
1) Open a link from Gmail
2) It should pop up a picker that lets you choose your locally built Chromium
3) It should appear as a Custom Tab
(https://developer.chrome.com/multidevice/android/customtabs)
4) From the menu, select "open in browser" or something; if your Chromium build
is set as your default browser then it should reparent the tab over.

+
         // TODO(newt): move this workaround into the infobar views if/when they're scrollable.
         // Workaround for http://crbug.com/407149. See explanation in onMeasure() below.
         setVerticalScrollBarEnabled(false);
@@ -178,6 +189,10 @@ public class InfoBarContainer extends SwipableOverlayView {
         mNativeInfoBarContainer = nativeInit();
     }
 
+    public SnackbarManager getSnackbarManager() {
+        return mSnackbarManager;
+    }
+
     /**
      * Adds an {@link InfoBarContainerObserver}.
      * @param observer The {@link InfoBarContainerObserver} to add.