Fix accidental updates of host's baselines_ in Elide().

ui/gfx/render_text_harfbuzz.cc

Index: ui/gfx/render_text_harfbuzz.cc
diff --git a/ui/gfx/render_text_harfbuzz.cc b/ui/gfx/render_text_harfbuzz.cc
index 63b0e4e0cd79d009e83cb9989e680f987def1e06..a25a8183db16b5a6db82cd1a786bcb6cb611cc86 100644
--- a/ui/gfx/render_text_harfbuzz.cc
+++ b/ui/gfx/render_text_harfbuzz.cc
@@ -1153,6 +1153,9 @@ void RenderTextHarfBuzz::ItemizeTextToRuns(
   // Use an empty color BreakList to avoid breaking runs at color boundaries.
   BreakList<SkColor> empty_colors;
   empty_colors.SetMax(text.length());
+  DCHECK_LE(text.size(), baselines().max());
+  for (const BreakList<bool>& style : styles())
+    DCHECK_LE(text.size(), style.max());
   internal::StyleIterator style(empty_colors, baselines(), styles());
 
   for (size_t run_break = 0; run_break < text.length();) {