6744401: Consider removal of code disabling JIT in Toolkit.getDefaultToolkit

Reviewed-by: anthony, pchelko

src/share/classes/java/awt/Toolkit.java

@@ -26,10 +26,6 @@
 package java.awt;
 
 import java.beans.PropertyChangeEvent;
-import java.util.MissingResourceException;
-import java.util.Properties;
-import java.util.ResourceBundle;
-import java.util.StringTokenizer;
 import java.awt.event.*;
 import java.awt.peer.*;
 import java.awt.im.InputMethodHighlight;
@@ -855,19 +851,11 @@ public abstract class Toolkit {
      */
     public static synchronized Toolkit getDefaultToolkit() {
         if (toolkit == null) {
-            try {
-                // We disable the JIT during toolkit initialization.  This
-                // tends to touch lots of classes that aren't needed again
-                // later and therefore JITing is counter-productiive.
-                java.lang.Compiler.disable();
-
             java.security.AccessController.doPrivileged(
                     new java.security.PrivilegedAction<Void>() {
                 public Void run() {
-                        String nm = null;
                     Class<?> cls = null;
-                        try {
-                            nm = System.getProperty("awt.toolkit");
+                    String nm = System.getProperty("awt.toolkit");
                     try {
                         cls = Class.forName(nm);
                     } catch (ClassNotFoundException e) {
@@ -875,30 +863,27 @@ public abstract class Toolkit {
                         if (cl != null) {
                             try {
                                 cls = cl.loadClass(nm);
-                                    } catch (ClassNotFoundException ee) {
+                            } catch (final ClassNotFoundException ignored) {
                                 throw new AWTError("Toolkit not found: " + nm);
                             }
                         }
                     }
+                    try {
                         if (cls != null) {
                             toolkit = (Toolkit)cls.newInstance();
                             if (GraphicsEnvironment.isHeadless()) {
                                 toolkit = new HeadlessToolkit(toolkit);
                             }
                         }
-                        } catch (InstantiationException e) {
+                    } catch (final InstantiationException ignored) {
                         throw new AWTError("Could not instantiate Toolkit: " + nm);
-                        } catch (IllegalAccessException e) {
+                    } catch (final IllegalAccessException ignored) {
                         throw new AWTError("Could not access Toolkit: " + nm);
                     }
                     return null;
                 }
             });
             loadAssistiveTechnologies();
-            } finally {
-                // Make sure to always re-enable the JIT.
-                java.lang.Compiler.enable();
-            }
         }
         return toolkit;
     }