Use GetDisplayText() instead of text() for rendering text.

ui/gfx/render_text_mac.cc

Index: ui/gfx/render_text_mac.cc
diff --git a/ui/gfx/render_text_mac.cc b/ui/gfx/render_text_mac.cc
index 1c046648dc63220fcca566f1ec8c85a106cd3d5e..27f4d06d76d753f6e976b73f799c25e420465c8e 100644
--- a/ui/gfx/render_text_mac.cc
+++ b/ui/gfx/render_text_mac.cc
@@ -94,7 +94,7 @@ std::vector<Rect> RenderTextMac::GetSubstringBounds(const Range& range) {
 
 size_t RenderTextMac::TextIndexToDisplayIndex(size_t index) {
   // TODO(asvitkine): Implement this. http://crbug.com/131618
-  return index;
+  return std::min(index, GetDisplayText().size());
 }
 
 size_t RenderTextMac::DisplayIndexToTextIndex(size_t index) {
@@ -148,7 +148,7 @@ void RenderTextMac::EnsureLayout() {
                          &kCFTypeDictionaryValueCallBacks));
 
   base::ScopedCFTypeRef<CFStringRef> cf_text(
-      base::SysUTF16ToCFStringRef(text()));
+      base::SysUTF16ToCFStringRef(GetDisplayText()));
   base::ScopedCFTypeRef<CFAttributedStringRef> attr_text(
       CFAttributedStringCreate(NULL, cf_text, attributes));
   base::ScopedCFTypeRef<CFMutableAttributedStringRef> attr_text_mutable(