Use local slice_chars

StrExt::slice_chars is deprecated and will be removed in Rust. This
lifts the implementation from Rust libstd and puts it in util::str.

This fixes a bunch of deprecation warnings in Servo.

1 files changed, 2 insertions, 1 deletions

diff --git a/components/layout/inline.rs b/components/layout/inline.rs
index bc5e432a82e..abf23e488dd 100644
--- a/components/layout/inline.rs
+++ b/components/layout/inline.rs
@@ -35,6 +35,7 @@ use unicode_bidi;
 use util::geometry::{Au, MAX_AU, ZERO_RECT};
 use util::logical_geometry::{LogicalRect, LogicalSize, WritingMode};
 use util::range::{Range, RangeIndex};
+use util::str::slice_chars;
 use util;
 
 // From gfxFontConstants.h in Firefox
@@ -1801,7 +1802,7 @@ fn strip_trailing_whitespace_if_necessary(text_run: &TextRun, range: &mut Range<
     debug!("stripping trailing whitespace: range={:?}, len={}",
            range,
            text_run.text.chars().count());
-    let text = text_run.text.slice_chars(range.begin().to_usize(), range.end().to_usize());
+    let text = slice_chars(&*text_run.text, range.begin().to_usize(), range.end().to_usize());
     let mut trailing_whitespace_character_count = 0;
     for ch in text.chars().rev() {
         if util::str::char_is_whitespace(ch) {