Make CPDF_TextState have a CPDF_TextStateData rather than inheriting one.

core/fxge/agg/fx_agg_driver.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.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fxge/agg/fx_agg_driver.h"
 
 #include <algorithm>
 
@@ skipping 510 matching lines @@
     m_pClipRgn = std::move(m_StateStack.back());
     m_StateStack.pop_back();
   }
 }
 
 void CFX_AggDeviceDriver::SetClipMask(agg::rasterizer_scanline_aa& rasterizer) {
   FX_RECT path_rect(rasterizer.min_x(), rasterizer.min_y(),
                     rasterizer.max_x() + 1, rasterizer.max_y() + 1);
   path_rect.Intersect(m_pClipRgn->GetBox());
   CFX_DIBitmapRef mask;
-  CFX_DIBitmap* pThisLayer = mask.New();
-  if (!pThisLayer) {
-    return;
-  }
+  CFX_DIBitmap* pThisLayer = mask.Emplace();
   pThisLayer->Create(path_rect.Width(), path_rect.Height(), FXDIB_8bppMask);
   pThisLayer->Clear(0);
   agg::rendering_buffer raw_buf(pThisLayer->GetBuffer(), pThisLayer->GetWidth(),
                                 pThisLayer->GetHeight(),
                                 pThisLayer->GetPitch());
   agg::pixfmt_gray8 pixel_buf(raw_buf);
   agg::renderer_base<agg::pixfmt_gray8> base_buf(pixel_buf);
   agg::renderer_scanline_aa_offset<agg::renderer_base<agg::pixfmt_gray8> >
       final_render(base_buf, path_rect.left, path_rect.top);
   final_render.color(agg::gray8(255));
@@ skipping 1219 matching lines @@
       WrapUnique(new CFX_AggDeviceDriver(pBitmap, FALSE, pOriDevice, FALSE)));
   return true;
 }
 
 CFX_FxgeDevice::~CFX_FxgeDevice() {
   if (m_bOwnedBitmap) {
     delete GetBitmap();
   }
 }
 #endif