Support the device font cache

core/fxge/skia/fx_skia_device.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/include/fxge/fx_ge.h"
 
 #if defined(_SKIA_SUPPORT_)
 #include "core/include/fxcodec/fx_codec.h"
 
 #include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
@@ skipping 302 matching lines @@
 
 FX_BOOL CFX_SkiaDeviceDriver::DrawDeviceText(int nChars,
                                              const FXTEXT_CHARPOS* pCharPos,
                                              CFX_Font* pFont,
                                              CFX_FontCache* pCache,
                                              const CFX_Matrix* pObject2Device,
                                              FX_FLOAT font_size,
                                              uint32_t color,
                                              int alpha_flag,
                                              void* pIccTransform) {
-  SkAutoTUnref<SkTypeface> typeface(SkTypeface::CreateFromStream(
-      new SkMemoryStream(pFont->GetFontData(), pFont->GetSize())));
+  CFX_TypeFace* typeface = pCache->GetDeviceCache(pFont);
   SkPaint paint;
   paint.setAntiAlias(true);
   paint.setColor(color);
   paint.setTypeface(typeface);
   paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
   paint.setTextSize(font_size);
   paint.setSubpixelText(true);
   m_pCanvas->save();
   SkMatrix skMatrix = ToFlippedSkMatrix(*pObject2Device);
   m_pCanvas->concat(skMatrix);
@@ skipping 417 matching lines @@
   SetDeviceDriver(pDriver);
   return TRUE;
 }
 
 CFX_SkiaDevice::~CFX_SkiaDevice() {
   if (m_bOwnedBitmap && GetBitmap())
     delete GetBitmap();
 }
 
 #endif