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..5bb9969a9955de989622bdc147a8af95f29db299 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;
@@ -108,6 +111,12 @@ public class InfoBarContainer extends SwipableOverlayView {
         @Override
         public void onReparentingFinished(Tab tab) {
             setParentView((ViewGroup) tab.getActivity().findViewById(R.id.bottom_container));
+            Activity activity = tab.getActivity();
+            if (activity != null && activity instanceof ChromeActivity) {

[gone, 2017/04/27 18:48:58]

instanceof already includes an implicit null check

[ramyasharma, 2017/04/28 06:35:59]

Thanks Done.

+                mSnackbarManager = ((ChromeActivity) activity).getSnackbarManager();
+            } else {
+                mSnackbarManager = null;
+            }
         }
     };
 
@@ -151,11 +160,19 @@ 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) {

[gone, 2017/04/27 18:48:58]

don't duplicate this logic; make a new private function

[ramyasharma, 2017/04/28 06:35:59]

Done. Thanks.

+            mSnackbarManager = ((ChromeActivity) activity).getSnackbarManager();
+        }
+
         // 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 +195,10 @@ public class InfoBarContainer extends SwipableOverlayView {
         mNativeInfoBarContainer = nativeInit();
     }
 
+    public SnackbarManager getSnackbarManager() {
+        return mSnackbarManager;
+    }
+
     /**
      * Adds an {@link InfoBarContainerObserver}.
      * @param observer The {@link InfoBarContainerObserver} to add.