Prevent infinite loop about itemizing text in RenderTextHarfBuzz.

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 a2610f3787288305adb7f9d3c7b07044d8391511..d6c26c0ab1446b53ec9d6afb7322b76cc39b7d37 100644
--- a/ui/gfx/render_text_harfbuzz.cc
+++ b/ui/gfx/render_text_harfbuzz.cc
@@ -1165,6 +1165,7 @@ void RenderTextHarfBuzz::ItemizeTextToRuns(
     run->underline = style.style(UNDERLINE);
     int32 script_item_break = 0;
     bidi_iterator.GetLogicalRun(run_break, &script_item_break, &run->level);
+
     // Odd BiDi embedding levels correspond to RTL runs.
     run->is_rtl = (run->level % 2) == 1;
     // Find the length and script of this script run.
@@ -1183,6 +1184,9 @@ void RenderTextHarfBuzz::ItemizeTextToRuns(
     if (run_break > run->range.start())
       run_break = FindRunBreakingCharacter(text, run->range.start(), run_break);
 
+    if (run_break <= run->range.start())
+      run_break = std::max(script_item_break, run_break + 1);
+
     DCHECK(IsValidCodePointIndex(text, run_break));
     style.UpdatePosition(DisplayIndexToTextIndex(run_break));
     run->range.set_end(run_break);