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diff --git a/third_party/mozilla/NSString+Utils.h b/third_party/mozilla/NSString+Utils.h
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+++ b/third_party/mozilla/NSString+Utils.h
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Chimera code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Simon Fraser <sfraser@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#import <Foundation/Foundation.h>
+
+typedef enum
+{
+  kTruncateAtStart,
+  kTruncateAtMiddle,
+  kTruncateAtEnd
+} ETruncationType;
+
+
+// a category to extend NSString
+@interface NSString (ChimeraStringUtils)
+
++ (id)ellipsisString;
++ (NSString*)stringWithUUID;
+
+- (BOOL)isEqualToStringIgnoringCase:(NSString*)inString;
+- (BOOL)hasCaseInsensitivePrefix:(NSString*)inString;
+
+// Some URIs can contain spaces and still work, even though they aren't strictly valid
+// per RFC2396. This method allows us to account for those URIs.
+- (BOOL)isLooselyValidatedURI;
+
+// Utility method to identify URIs that can be run in the context of the current page.
+// These URIs could be used as attack vectors via AppleScript, for example.
+- (BOOL)isPotentiallyDangerousURI;
+
+// Utility method to ensure validity of URI strings. NSURL is used to validate
+// most of them, but the NSURL test may fail for |javascript:| and |data:| URIs
+// because they often contain invalid (per RFC2396) characters such as spaces.
+- (BOOL)isValidURI;
+
+- (NSString *)stringByRemovingCharactersInSet:(NSCharacterSet*)characterSet;
+- (NSString *)stringByReplacingCharactersInSet:(NSCharacterSet*)characterSet withString:(NSString*)string;
+- (NSString *)stringByTruncatingTo:(unsigned int)maxCharacters at:(ETruncationType)truncationType;
+- (NSString *)stringByTruncatingToWidth:(float)inWidth at:(ETruncationType)truncationType withAttributes:(NSDictionary *)attributes;
+- (NSString *)stringByTrimmingWhitespace;
+- (NSString *)stringByRemovingAmpEscapes;
+- (NSString *)stringByAddingAmpEscapes;
+
+@end
+
+@interface NSMutableString (ChimeraMutableStringUtils)
+
+- (void)truncateTo:(unsigned)maxCharacters at:(ETruncationType)truncationType;
+- (void)truncateToWidth:(float)maxWidth at:(ETruncationType)truncationType withAttributes:(NSDictionary *)attributes;
+
+@end
+
+@interface NSString (ChimeraFilePathStringUtils)
+
+- (NSString*)volumeNamePathComponent;
+- (NSString*)displayNameOfLastPathComponent;
+
+@end
+
+@interface NSString (CaminoURLStringUtils)
+
+// Returns true if the string represents a "blank" URL ("" or "about:blank")
+- (BOOL)isBlankURL;
+// Returns a URI that looks good in a location field
+- (NSString *)unescapedURI;
+
+@end