Support setting mouse cursor icon in Android N.

chrome/android/java/src/org/chromium/chrome/browser/snackbar/BottomContainer.java

 // Copyright 2017 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.snackbar;
 
 import android.content.Context;
 import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.MeasureSpec;
 import android.widget.FrameLayout;
 
 import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
 import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager.FullscreenListener;
 
 /**
  * The container that holds both infobars and snackbars. It will be translated up and down when the
  * bottom controls' offset changes.
  */
 public class BottomContainer extends FrameLayout implements FullscreenListener {
 
     private ChromeFullscreenManager mFullscreenManager;
 
     /**
      * Constructor for XML inflation.
      */
     public BottomContainer(Context context, AttributeSet attrs) {
         super(context, attrs);
     }
 
     /**
      * Initializes this container.
      */
     public void initialize(ChromeFullscreenManager fullscreenManager) {
         mFullscreenManager = fullscreenManager;
         mFullscreenManager.addListener(this);
         setTranslationY(-fullscreenManager.getBottomControlsHeight());
     }
 
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int height = 0;

[Ted C, 2017/07/18 16:41:18]

Why do we need this?  Is this view set as MATCH_PARENT?  The logic you are
adding seems like WRAP_CONTENT.

+        int width = MeasureSpec.getSize(widthMeasureSpec);
+        int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) continue;
+            measureChild(child, widthMeasureSpec, heightMeasureSpec);
+            width = Math.max(width, child.getMeasuredWidth());
+            height = Math.max(height, child.getMeasuredHeight());
+        }
+        height = Math.max(height, getSuggestedMinimumHeight());
+        width = Math.max(width, getSuggestedMinimumWidth());
+        setMeasuredDimension(width, height);
+    }
+
     // FullscreenListner methods
     @Override
     public void onControlsOffsetChanged(float topOffset, float bottomOffset, boolean needsAnimate) {
         setTranslationY(bottomOffset - mFullscreenManager.getBottomControlsHeight());
     }
 
     @Override
     public void onBottomControlsHeightChanged(int bottomControlsHeight) {
         setTranslationY(-bottomControlsHeight);
     }
 
     @Override
     public void onContentOffsetChanged(float offset) { }
 
     @Override
     public void onToggleOverlayVideoMode(boolean enabled) { }
 }