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diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug510905_Browser_TwoJsConsoles.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug510905_Browser_TwoJsConsoles.java
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index 0000000000..017be8f1b9
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+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug510905_Browser_TwoJsConsoles.java
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Red Hat and others. All rights reserved.
+ * The contents of this file are made available under the terms
+ * of the GNU Lesser General Public License (LGPL) Version 2.1 that
+ * accompanies this distribution (lgpl-v21.txt).  The LGPL is also
+ * available at http://www.gnu.org/licenses/lgpl.html.  If the version
+ * of the LGPL at http://www.gnu.org is different to the version of
+ * the LGPL accompanying this distribution and there is any conflict
+ * between the two license versions, the terms of the LGPL accompanying
+ * this distribution shall govern.
+ *
+ * Contributors:
+ *     Red Hat - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.tests.gtk.snippets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.browser.Browser;
+import org.eclipse.swt.browser.BrowserFunction;
+import org.eclipse.swt.events.KeyAdapter;
+import org.eclipse.swt.events.KeyEvent;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.layout.RowLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Text;
+
+/*
+ * Title:  [GTK3][Webkit2] Implement webkit2 support for browser function (Part 2: Java return a value from callback.)
+ * How to run: Snippet to execute javascript via input prompt, to test Browser Func return value ability.
+ * Bug description:
+ * Expected results:
+ * GTK Version(s):
+ */
+public class Bug510905_Browser_TwoJsConsoles {
+
+	static int count = 0;
+
+	public static void main(String[] args) {
+		Display display = new Display();
+		Shell shell = new Shell(display);
+		shell.setSize(500, 600);
+
+		shell.setLayout(new RowLayout());
+
+		Composite leftBrowser = new Composite(shell, SWT.NONE);
+		Composite rightBrowser = new Composite(shell, SWT.None);
+		Button button = new Button (rightBrowser, SWT.PUSH);
+		button.setText("my button");
+
+
+		final Browser browser = makeBrowserWithConsole(leftBrowser, "theJavaFunction");
+		new CustomFunction (browser, "theJavaFunction");
+
+		final Browser browser2 = makeBrowserWithConsole(rightBrowser, "theJavaFunction");
+		new CustomFunction (browser2, "theJavaFunction");
+
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+
+	/**
+	 * @param leftBrowser
+	 * @return
+	 */
+	private static Browser makeBrowserWithConsole(Composite leftBrowser, String funcName) {
+		GridLayout gridLayout = new GridLayout();
+		leftBrowser.setLayout(gridLayout);
+
+		final Text jsConsole = new Text(leftBrowser, SWT.BORDER);
+		jsConsole.setText("document.body.innerHTML = " + funcName + "(123)"); // Case where there are no paramaters.
+		jsConsole.setSelection(jsConsole.getText().length());
+		GridData data = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
+		jsConsole.setLayoutData(data);
+
+		final Browser browser = new Browser(leftBrowser, SWT.NONE);
+		browser.setText("hello <b>world!</b>");
+		data = new GridData(SWT.FILL, SWT.FILL, true, true);
+		browser.setLayoutData(data);
+
+		jsConsole.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyPressed(KeyEvent e) {
+				if (e.keyCode == 13) { // 13 = Enter
+					browser.execute(jsConsole.getText());
+				}
+			}
+		});
+
+		Button loadNewPage = new Button(leftBrowser, SWT.PUSH);
+		loadNewPage.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
+		loadNewPage.setText("Load new Page");
+		loadNewPage.addSelectionListener(new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				browser.setText("New page!" + count++);
+			}
+		});
+		return browser;
+	}
+
+	static class CustomFunction extends BrowserFunction { // copied from snippet 307
+		CustomFunction (Browser browser, String name) {
+			super (browser, name);
+		}
+		@Override
+		public Object function (Object[] arguments) {
+			System.out.println ("theJavaFunction() called from javascript with args:");
+			for (int i = 0; i < arguments.length; i++) {
+				Object arg = arguments[i];
+				if (arg == null) {
+					System.out.println ("\t-->null");
+				} else {
+					System.out.println ("\t-->" + arg.getClass ().getName () + ": " + arg.toString ());
+				}
+			}
+			return arguments;
+		}
+	}
+}