Re-land: Remove FX_Alloc() null checks now that it can't return NULL.

core/src/fxge/dib/fx_dib_engine.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 "../../../include/fxge/fx_dib.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "dib_int.h"
 #include <limits.h>
@@ skipping 778 matching lines @@
         m_bFlipY = TRUE;
         m_DestHeight = -m_DestHeight;
     }
     m_LineIndex = 0;
     FX_DWORD size = m_ClipRect.Width();
     if (size && m_DestBPP > (int)(INT_MAX / size)) {
         return FALSE;
     }
     size *= m_DestBPP;
     m_pScanline = FX_Alloc(FX_BYTE, (size / 8 + 3) / 4 * 4);
-    if (!m_pScanline) {
-        return FALSE;
-    }
     if (m_pSource->m_pAlphaMask) {
         m_pMaskScanline = FX_Alloc(FX_BYTE, (m_ClipRect.Width() + 3) / 4 * 4);
-        if (!m_pMaskScanline) {
-            return FALSE;
-        }
     }
     if (m_pSource->GetWidth() * m_pSource->GetHeight() < MAX_PROGRESSIVE_STRETCH_PIXELS) {
         ContinueQuickStretch(NULL);
         return FALSE;
     }
     return TRUE;
 }
 FX_BOOL CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause)
 {
     if (m_pScanline == NULL) {
@@ skipping 20 matching lines @@
             return TRUE;
         }
         m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
         if (m_pMaskScanline) {
             m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline, 1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
         }
         m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline);
     }
     return FALSE;
 }