mac: Fix a few memory leaks.

chrome/browser/ui/cocoa/applescript/element_applescript.mm

 // Copyright (c) 2010 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.
 
 #import "chrome/browser/ui/cocoa/applescript/element_applescript.h"
 
 @implementation ElementAppleScript
 
 @synthesize uniqueID = uniqueID_;
 @synthesize container = container_;
 @synthesize containerProperty = containerProperty_;
 
 // calling objectSpecifier asks an object to return an object specifier
 // record referring to itself.  You must call setContainer:property: before
 // you can call this method.
 - (NSScriptObjectSpecifier*)objectSpecifier {
-  return [[NSUniqueIDSpecifier allocWithZone:[self zone]]
-                  initWithContainerClassDescription:
-      (NSScriptClassDescription*)[[self container] classDescription]
-                                 containerSpecifier:
-                                    [[self container] objectSpecifier]
-                                                key:[self containerProperty]
-                                           uniqueID:[self uniqueID]];
+  return [[[NSUniqueIDSpecifier allocWithZone:[self zone]]
+      initWithContainerClassDescription:
+          (NSScriptClassDescription*)[[self container] classDescription]
+                     containerSpecifier:[[self container] objectSpecifier]
+                                    key:[self containerProperty]
+                               uniqueID:[self uniqueID]] autorelease];
 }
 
 - (void)setContainer:(id)value property:(NSString*)property {
   [self setContainer:value];
   [self setContainerProperty:property];
 }
 
 - (void)dealloc {
   [uniqueID_ release];
   [container_ release];
   [containerProperty_ release];
   [super dealloc];
 }
 
 @end