Support setting mouse cursor icon in Android N.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java b/chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java
index d4c3d6fbc30821989e553b2ff6db1812620240dd..18014fa600d81d889835892d618d0af56e3be833 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java
@@ -12,9 +12,11 @@ import android.app.Activity;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.GradientDrawable;
+import android.os.Build;
 import android.support.annotation.Nullable;
 import android.view.Gravity;
 import android.view.LayoutInflater;
+import android.view.PointerIcon;
 import android.view.SurfaceView;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -93,6 +95,9 @@ class SnackbarView {
         mActionButtonView.setOnClickListener(listener);
         mProfileImageView = (ImageView) mView.findViewById(R.id.snackbar_profile_image);
 
+        setPointerIcon(mMessageView, PointerIcon.TYPE_TEXT);
+        setPointerIcon(mActionButtonView, PointerIcon.TYPE_HAND);
+
         updateInternal(snackbar, false);
     }
 
@@ -142,20 +147,16 @@ class SnackbarView {
         // Only update if the visible frame has changed, otherwise there will be a layout loop.
         if (!mCurrentVisibleRect.equals(mPreviousVisibleRect)) {
             mPreviousVisibleRect.set(mCurrentVisibleRect);
-
-            int keyboardHeight = mParent.getHeight() - mCurrentVisibleRect.bottom
-                    + mCurrentVisibleRect.top;
-            FrameLayout.LayoutParams lp = getLayoutParams();

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

this change will prevent snackbars from appearing about the keyboard.  is that
intentional?

[jaebaek, 2017/07/19 01:18:53]

Yes, it is intentional. When we set the height of BottomContainer
as wrap_content, snackbar is shown properly without this code.
Rather, this bottomMargin hides snackbar because it becomes a
large minus number.

-            lp.bottomMargin = keyboardHeight;
             if (mIsTablet) {
+                FrameLayout.LayoutParams lp = getLayoutParams();
                 int margin = mParent.getResources()
                         .getDimensionPixelSize(R.dimen.snackbar_margin_tablet);
                 int width = mParent.getResources()
                         .getDimensionPixelSize(R.dimen.snackbar_width_tablet);
                 lp.width = Math.min(width, mParent.getWidth() - 2 * margin);
                 lp.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
+                mView.setLayoutParams(lp);
             }
-            mView.setLayoutParams(lp);
         }
     }
 
@@ -286,4 +287,11 @@ class SnackbarView {
             view.setText(text);
         }
     }
+
+    private static void setPointerIcon(View view, int type) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            PointerIcon icon = PointerIcon.getSystemIcon(view.getContext(), type);
+            view.setPointerIcon(icon);
+        }
+    }
 }