Cleanup various IFX_ text interfaces.

This CL removes IFX_ArabicChar, IFX_RTFBreak, IFX_TxtBreak, IFX_WordBreak,
IFX_FormatString, and IFX_GSUBTable. References were updated to be the concrete
classes.

The CFX_GSUBTable was also removed as it is unused.

BUG=pdfium:468

Review URL: https://codereview.chromium.org/1882213002

2 files changed, 1 insertions, 38 deletions

diff --git a/core/fpdfapi/fpdf_font/ttgsubtable.cpp b/core/fpdfapi/fpdf_font/ttgsubtable.cpp
index 321419346d..f6d6400f47 100644
--- a/core/fpdfapi/fpdf_font/ttgsubtable.cpp
+++ b/core/fpdfapi/fpdf_font/ttgsubtable.cpp
@@ -382,34 +382,3 @@ void CFX_CTTGSUBTable::ParseSingleSubstFormat2(FT_Bytes raw,
     rec->Substitute[i] = GetUInt16(sp);
   }
 }
-FX_BOOL CFX_GSUBTable::GetVerticalGlyph(uint32_t glyphnum,
-                                        uint32_t* vglyphnum) {
-  return m_GsubImp.GetVerticalGlyph(glyphnum, vglyphnum);
-}
-// static
-IFX_GSUBTable* IFX_GSUBTable::Create(CFX_Font* pFont) {
-  if (!pFont) {
-    return NULL;
-  }
-  if (!pFont->GetSubData()) {
-    unsigned long length = 0;
-    int error = FXFT_Load_Sfnt_Table(
-        pFont->GetFace(), FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, NULL, &length);
-    if (!error) {
-      pFont->SetSubData(FX_Alloc(uint8_t, length));
-    }
-    if (!pFont->GetSubData()) {
-      return NULL;
-    }
-  }
-  int error =
-      FXFT_Load_Sfnt_Table(pFont->GetFace(), FT_MAKE_TAG('G', 'S', 'U', 'B'), 0,
-                           pFont->GetSubData(), NULL);
-  if (!error && pFont->GetSubData()) {
-    std::unique_ptr<CFX_GSUBTable> pGsubTable(new CFX_GSUBTable);
-    if (pGsubTable->m_GsubImp.LoadGSUBTable((FT_Bytes)pFont->GetSubData())) {
-      return pGsubTable.release();
-    }
-  }
-  return NULL;
-}
diff --git a/core/fpdfapi/fpdf_font/ttgsubtable.h b/core/fpdfapi/fpdf_font/ttgsubtable.h
index 7a6c66cc2a..0ef2351336 100644
--- a/core/fpdfapi/fpdf_font/ttgsubtable.h
+++ b/core/fpdfapi/fpdf_font/ttgsubtable.h
@@ -25,6 +25,7 @@ class CFX_GlyphMap {
  protected:
   CFX_BinaryBuf m_Buffer;
 };
+
 class CFX_CTTGSUBTable {
  public:
   CFX_CTTGSUBTable(void) : m_bFeautureMapLoad(FALSE), loaded(false) {}
@@ -352,12 +353,5 @@ class CFX_CTTGSUBTable {
   struct TFeatureList FeatureList;
   struct TLookupList LookupList;
 };
-class CFX_GSUBTable final : public IFX_GSUBTable {
- public:
-  ~CFX_GSUBTable() override {}
-  FX_BOOL GetVerticalGlyph(uint32_t glyphnum, uint32_t* vglyphnum) override;
-
-  CFX_CTTGSUBTable m_GsubImp;
-};
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_