Fix screen flicker when resizing CRD window in split-screen mode

remoting/android/java/src/org/chromium/chromoting/Desktop.java

Index: remoting/android/java/src/org/chromium/chromoting/Desktop.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/Desktop.java b/remoting/android/java/src/org/chromium/chromoting/Desktop.java
index 9cfb8792fbf1770594710127ea79b3196f2bfbfe..6c4ffd8aa6d939ed06a9dc7ea51b360c51aeddf5 100644
--- a/remoting/android/java/src/org/chromium/chromoting/Desktop.java
+++ b/remoting/android/java/src/org/chromium/chromoting/Desktop.java
@@ -6,6 +6,8 @@ package org.chromium.chromoting;
 
 import android.annotation.SuppressLint;
 import android.content.res.Configuration;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
@@ -128,6 +130,12 @@ public class Desktop
         View decorView = getWindow().getDecorView();
         decorView.setOnSystemUiVisibilityChangeListener(this);
 
+        // The background color is displayed when the user resizes the window in split-screen past
+        // the boundaries of the image we render.  The default background is white and we use black
+        // for our canvas, thus there is a visual artifact when we draw the canvas over the
+        // background.  Setting the background color to match our canvas will prevent the flash.
+        getWindow().setBackgroundDrawable(new ColorDrawable(Color.BLACK));

[Lambros, 2016/11/07 20:36:25]

Would Color.TRANSPARENT be better?

[joedow, 2016/11/07 21:12:44]

BLACK and TRANSPARENT have a similar effect on my test device (i.e. they both 
end up displayed as black).  I prefer the opaque color just to be explicit about
what we want.

+
         mActivityLifecycleListener = mClient.getCapabilityManager().onActivityAcceptingListener(
                 this, Capabilities.CAST_CAPABILITY);
         mActivityLifecycleListener.onActivityCreated(this, savedInstanceState);