Upstream NSString+CrStringDrawing changes.

ui/gfx/ios/NSString+CrStringDrawing.h

 // Copyright 2014 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.
 
 #ifndef UI_GFX_IOS_NSSTRING_CR_STRING_DRAWING_H_
 #define UI_GFX_IOS_NSSTRING_CR_STRING_DRAWING_H_
 
 #import <UIKit/UIKit.h>
 
 @interface NSString (CrStringDrawing)
@@ skipping 32 matching lines @@
 // 7 in favor of -sizeWithAttributes:. Specifically, this method will return
 // CGSizeZero if |font| is nil, and the width and height returned are rounded up
 // to integer values.
 // TODO(lliabraa): This method was added to ease the transition off of the
 // deprecated sizeWithFont: method. New call sites should not be added and
 // existing call sites should be audited to determine the correct behavior for
 // nil |font| and rounding, then replaced with cr_pixelAlignedSizeWithFont: or
 // sizeWithAttributes: (crbug.com/364419).
 - (CGSize)cr_sizeWithFont:(UIFont*)font;
 
+// If |index| is 0, returns an empty string.
+// If |index| is >= than self.length, returns self.
+// Otherwise, returns string cut to have |index| characters with an
+// ellipsis at the end.
+- (NSString*)cr_stringByCuttingToIndex:(NSUInteger)index;
+
+// Returns an elided version of string that fits in |bounds|.
+// System font of Label size is used for determining the string drawing size.
+- (NSString*)cr_stringByElidingToFitSize:(CGSize)bounds;
+
 @end
 
 #endif  // UI_GFX_IOS_NSSTRING_CR_STRING_DRAWING_H_