Dismiss menu when infobar's host tab is hidden. (new translate infobar)

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 8d745a6d7e82f075152ccb8c27bd0d83be4b21b4..35ac20148f12eafeffc23aea02f8349da95781c2 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
@@ -261,6 +261,14 @@ public class InfoBarContainer extends SwipableOverlayView {
         super.addToParentView(mParentView);
     }
 
+    @Override
+    public boolean removeFromParentView() {
+        if (hasInfoBars()) {
+            mInfoBars.get(0).onInfoBarContainerStartedHiding();

[mdjones, 2017/06/22 19:00:16]

Why only index 0?

[Marti Wong, 2017/06/23 01:39:10]

(0) means the top of the infobar stack.
only the top infobar has the chance to own any child UIs and need to be taken
care of.
I will add a comment to explain this here.

+        }
+        return super.removeFromParentView();
+    }
+
     /**
      * Adds an InfoBar to the view hierarchy.
      * @param infoBar InfoBar to add to the View hierarchy.