De-virtualize CBC_OneDimWriter::RenderTextContents().

It is only ever called in cbc_code39.cpp directly on the one
subclass that actually implements it.

Change-Id: I462251c2ee564ad1ee47390a3496e08b1385b261
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/62050
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

fxbarcode/oned/BC_OneDimWriter.cpp

diff --git a/fxbarcode/oned/BC_OneDimWriter.cpp b/fxbarcode/oned/BC_OneDimWriter.cpp
index 7cd06ec..5a02cdf 100644
--- a/fxbarcode/oned/BC_OneDimWriter.cpp
+++ b/fxbarcode/oned/BC_OneDimWriter.cpp
@@ -303,7 +303,3 @@
     m_output.back().AppendRect(x, 0.0f, x + 1, 1.0f);
   }
 }
-
-WideString CBC_OneDimWriter::RenderTextContents(WideStringView contents) {
-  return WideString();
-}

fxbarcode/oned/BC_OneDimWriter.h

diff --git a/fxbarcode/oned/BC_OneDimWriter.h b/fxbarcode/oned/BC_OneDimWriter.h
index 9a28479..3e0ccc9 100644
--- a/fxbarcode/oned/BC_OneDimWriter.h
+++ b/fxbarcode/oned/BC_OneDimWriter.h
@@ -30,7 +30,6 @@
                             int32_t codeLength);
   virtual bool CheckContentValidity(WideStringView contents) = 0;
   virtual WideString FilterContents(WideStringView contents) = 0;
-  virtual WideString RenderTextContents(WideStringView contents);
   virtual void SetPrintChecksum(bool checksum);
   virtual void SetDataLength(int32_t length);
   virtual void SetCalcChecksum(bool state);

fxbarcode/oned/BC_OnedCode39Writer.h

diff --git a/fxbarcode/oned/BC_OnedCode39Writer.h b/fxbarcode/oned/BC_OnedCode39Writer.h
index 945099c..525573a 100644
--- a/fxbarcode/oned/BC_OnedCode39Writer.h
+++ b/fxbarcode/oned/BC_OnedCode39Writer.h
@@ -27,10 +27,10 @@
                     int32_t codeLength) override;
   bool CheckContentValidity(WideStringView contents) override;
   WideString FilterContents(WideStringView contents) override;
-  WideString RenderTextContents(WideStringView contents) override;
   bool SetTextLocation(BC_TEXT_LOC location) override;
   bool SetWideNarrowRatio(int8_t ratio) override;
 
+  WideString RenderTextContents(WideStringView contents);
   bool encodedContents(WideStringView contents, WideString* result);
 
  private: