Fix specific WidgetWin32Tests to not use Layout

Some of the tests in WidgetWin32Tests assert the size of the
controls after DPI_CHANGE. The tests work fine since theres
no updateLayout called but its deffered to be executed after
the thread is free and hence the controls size are unaffected.
However this is risky and layouting can make the values arbitrary and
the tests can fail. Hence, we simply test the absolute values
without using any Layout in this commit.

Author: amartya4256

bundles/org.eclipse.swt/Eclipse SWT Tests/win32/org/eclipse/swt/widgets/WidgetWin32Tests.java

@@ -55,17 +55,14 @@ public void testButtonPointsAfterZooming() throws NoSuchMethodException, Illegal
 		int scaledZoom = zoom * 2;
 
 		shell.setBounds(0, 0, 100, 160);
-		shell.setLayout(new FillLayout());
-		shell.pack();
 
 		Button button = new Button(shell, SWT.PUSH);
 		button.setText("Button");
 		button.setBounds(0, 0, 100, 200);
-		Point sizeBeforeEvent = button.getSize();
-		Point p1 = button.computeSizeInPixels(sizeBeforeEvent.x, sizeBeforeEvent.y, false);
+		Point p1 = button.getSize();
+
 		DPITestUtil.changeDPIZoom(shell, scaledZoom);
-		Point sizeAfterEvent = button.getSize();
-		Point p2 = button.computeSizeInPixels(sizeAfterEvent.x, sizeAfterEvent.y, false);
+		Point p2 = button.getSize();
 
 		assertEquals("Width should be half in points after zooming to 200", p1.x / 2 , p2.x);
 		assertEquals("Height should be half in points after zooming to 200", p1.y / 2, p2.y);
@@ -134,8 +131,6 @@ public void testCoolItemAfterZooming() {
 
 
 		shell.setBounds(0, 0, 100, 160);
-		shell.setLayout(new FillLayout());
-		shell.pack();
 
 		CoolBar coolBar = new CoolBar(shell, SWT.NONE);
 		CoolItem item1 = new CoolItem(coolBar, SWT.NONE);
@@ -200,8 +195,6 @@ public void testTabFolderSizeAfterZooming() {
 		int scaledZoom = zoom * 2;
 
 		shell.setBounds(0, 0, 100, 160);
-		shell.setLayout(new FillLayout());
-		shell.pack();
 
 		TabFolder tabFolder = new TabFolder(shell, SWT.NONE);
 		tabFolder.setBounds(20, 20, 360, 240);