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

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.infobar;
 
 import android.content.Context;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
@@ skipping 243 matching lines @@
      */
     @VisibleForTesting
     public boolean isAnimating() {
         return mLayout.isAnimating();
     }
 
     private void addToParentView() {
         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.
      */
     @CalledByNative
     private void addInfoBar(InfoBar infoBar) {
         assert !mDestroyed;
         if (infoBar == null) {
             return;
         }
@@ skipping 170 matching lines @@
         }
 
         super.onLayout(changed, l, t, r, b);
     }
 
     private native long nativeInit();
     private native void nativeSetWebContents(
             long nativeInfoBarContainerAndroid, WebContents webContents);
     private native void nativeDestroy(long nativeInfoBarContainerAndroid);
 }