Removed and replaced autoScaleUpUsingNativeDPI

This commit replaces the DPIUtil.autoScaleUpUsingNativeDPI calls
from clients in win32 with DPIUtil.scaleUp utilizing the zoom
available within the clients. It additionally removes the method
DPIUtil.autoScaleUpUsingNativeDPI since it's not used anymore.

contributes to #62 and #127

Author: amartya4256

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/DPIUtil.java

@@ -393,15 +393,6 @@ public static int scaleUp(int size, int zoom) {
 	return Math.round (size * scaleFactor);
 }
 
-/**
- * Auto-scale up int dimensions using Native DPI
- */
-public static int autoScaleUpUsingNativeDPI (int size) {
-	if (nativeDeviceZoom == 100 || size == SWT.DEFAULT) return size;
-	float nativeScaleFactor = nativeDeviceZoom / 100f;
-	return Math.round (size * nativeScaleFactor);
-}
-
 /**
  * Auto-scale up int dimensions if enabled for Drawable class.
  */

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Button.java

@@ -1314,7 +1314,7 @@ private int getCheckboxTextOffset(long hdc) {
 		OS.GetThemePartSize(display.hButtonTheme(), hdc, OS.BP_CHECKBOX, OS.CBS_UNCHECKEDNORMAL, null, OS.TS_TRUE, size);
 		result += size.cx;
 	} else {
-		result += DPIUtil.autoScaleUpUsingNativeDPI(13);
+		result += DPIUtil.scaleUp(13, nativeZoom);
 	}
 
 	// Windows uses half width of '0' as checkbox-to-text distance.

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/MenuItem.java

@@ -1161,7 +1161,7 @@ LRESULT wmMeasureChild (long wParam, long lParam) {
 			 * NOTE: autoScaleUpUsingNativeDPI() is used to avoid problems
 			 * with applications that disable automatic scaling.
 			 */
-			struct.itemWidth = DPIUtil.autoScaleUpUsingNativeDPI(5);
+			struct.itemWidth = DPIUtil.scaleUp(5, nativeZoom);
 			OS.MoveMemory (lParam, struct, MEASUREITEMSTRUCT.sizeof);
 			return null;
 		}

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Table.java

@@ -6915,7 +6915,7 @@ LRESULT wmNotifyHeader (NMHDR hdr, long wParam, long lParam) {
 							 * Sort indicator size needs to scale as per the Native Windows OS DPI level
 							 * when header is custom drawn. For more details refer bug 537097.
 							 */
-							int leg = DPIUtil.autoScaleUpUsingNativeDPI(3);
+							int leg = DPIUtil.scaleUp(3, nativeZoom);
 							if (sortDirection == SWT.UP) {
 								OS.Polyline(nmcd.hdc, new int[] {center-leg, 1+leg, center+1, 0}, 2);
 								OS.Polyline(nmcd.hdc, new int[] {center+leg, 1+leg, center-1, 0}, 2);

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tree.java

@@ -7884,7 +7884,7 @@ LRESULT wmNotifyHeader (NMHDR hdr, long wParam, long lParam) {
 							 * Sort indicator size needs to scale as per the Native Windows OS DPI level
 							 * when header is custom drawn. For more details refer bug 537097.
 							 */
-							int leg = DPIUtil.autoScaleUpUsingNativeDPI(3);
+							int leg = DPIUtil.scaleUp(3, nativeZoom);
 							if (sortDirection == SWT.UP) {
 								OS.Polyline(nmcd.hdc, new int[] {center-leg, 1+leg, center+1, 0}, 2);
 								OS.Polyline(nmcd.hdc, new int[] {center+leg, 1+leg, center-1, 0}, 2);