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

remoting/android/java/src/org/chromium/chromoting/RenderData.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.chromoting;
 
 import android.graphics.Matrix;
 import android.graphics.PointF;
 
 /**
@@ skipping 39 matching lines @@
             mCursorPosition.x = newX;
             cursorMoved = true;
         }
         if (newY != mCursorPosition.y) {
             mCursorPosition.y = newY;
             cursorMoved = true;
         }
 
         return cursorMoved;
     }
+
+    /**
+     * Indicates whether all information required to render the canvas has been set.
+     *
+     * @return True if both screen and image dimensions have been set.
+     */
+    public boolean initialized() {
+        return imageWidth != 0 && imageHeight != 0 && screenWidth != 0 && screenHeight != 0;
+    }
 }