Clean up CFX_ImageStretcher.

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 1736 matching lines @@
   FX_RECT dest_rect(dest_left, dest_top, dest_left + dest_width,
                     dest_top + dest_height);
   dest_rect.Normalize();
   FX_RECT dest_clip = dest_rect;
   dest_clip.Intersect(*pClipRect);
   CFX_BitmapComposer composer;
   composer.Compose(m_pBitmap, m_pClipRgn, 255, argb, dest_clip, FALSE, FALSE,
                    FALSE, m_bRgbByteOrder, alpha_flag, pIccTransform,
                    blend_type);
   dest_clip.Offset(-dest_rect.left, -dest_rect.top);
-  CFX_ImageStretcher stretcher;
-  if (stretcher.Start(&composer, pSource, dest_width, dest_height, dest_clip,
-                      flags)) {
-    stretcher.Continue(NULL);
-  }
+  CFX_ImageStretcher stretcher(&composer, pSource, dest_width, dest_height,
+                               dest_clip, flags);
+  if (stretcher.Start())
+    stretcher.Continue(nullptr);
   return TRUE;
 }
 
 FX_BOOL CFX_AggDeviceDriver::StartDIBits(const CFX_DIBSource* pSource,
                                          int bitmap_alpha,
                                          uint32_t argb,
                                          const CFX_Matrix* pMatrix,
                                          uint32_t render_flags,
                                          void*& handle,
                                          int alpha_flag,
@@ skipping 58 matching lines @@
       new CFX_AggDeviceDriver(pBitmap, dither_bits, FALSE, pOriDevice, FALSE);
   SetDeviceDriver(pDriver);
   return true;
 }
 
 CFX_FxgeDevice::~CFX_FxgeDevice() {
   if (m_bOwnedBitmap) {
     delete GetBitmap();
   }
 }