Moving string normalization out of HarfBuzz

third_party/WebKit/Source/platform/text/TextRun.h

Index: third_party/WebKit/Source/platform/text/TextRun.h
diff --git a/third_party/WebKit/Source/platform/text/TextRun.h b/third_party/WebKit/Source/platform/text/TextRun.h
index bc0aef1cebd67f623386a6a823b1ee13560ba42f..65bf6dcbef05971a490883f71e49b5b888de0a48 100644
--- a/third_party/WebKit/Source/platform/text/TextRun.h
+++ b/third_party/WebKit/Source/platform/text/TextRun.h
@@ -258,6 +258,11 @@ class PLATFORM_EXPORT TextRun final {
     return static_cast<TextJustify>(m_textJustify);
   }
 
+  // Up-converts to UTF-16 as needed and normalizes spaces and Unicode control
+  // characters as per the CSS Text Module Level 3 specification.
+  // https://drafts.csswg.org/css-text-3/#white-space-processing
+  std::unique_ptr<UChar[]> normalizedUTF16(unsigned* resultLength) const;
+
  private:
   union {
     const LChar* characters8;