Get rid of most instance of 'foo != NULL'

core/src/fpdfapi/fpdf_page/fpdf_page_pattern.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 "pageint.h"
 
 #include "core/include/fpdfapi/fpdf_page.h"
 
@@ skipping 26 matching lines @@
 }
 CPDF_Pattern::~CPDF_Pattern() {}
 CPDF_TilingPattern::CPDF_TilingPattern(CPDF_Document* pDoc,
                                        CPDF_Object* pPatternObj,
                                        const CFX_Matrix* parentMatrix)
     : CPDF_Pattern(parentMatrix) {
   m_PatternType = PATTERN_TILING;
   m_pPatternObj = pPatternObj;
   m_pDocument = pDoc;
   CPDF_Dictionary* pDict = m_pPatternObj->GetDict();
-  ASSERT(pDict != NULL);
+  ASSERT(pDict);
   m_Pattern2Form = pDict->GetMatrix("Matrix");
   m_bColored = pDict->GetInteger("PaintType") == 1;
   if (parentMatrix) {
     m_Pattern2Form.Concat(*parentMatrix);
   }
   m_pForm = NULL;
 }
 CPDF_TilingPattern::~CPDF_TilingPattern() {
   delete m_pForm;
   m_pForm = NULL;
@@ skipping 23 matching lines @@
                                          CPDF_Object* pPatternObj,
                                          FX_BOOL bShading,
                                          const CFX_Matrix* parentMatrix)
     : CPDF_Pattern(parentMatrix) {
   m_PatternType = PATTERN_SHADING;
   m_pPatternObj = bShading ? NULL : pPatternObj;
   m_pDocument = pDoc;
   m_bShadingObj = bShading;
   if (!bShading) {
     CPDF_Dictionary* pDict = m_pPatternObj->GetDict();
-    ASSERT(pDict != NULL);
+    ASSERT(pDict);
     m_Pattern2Form = pDict->GetMatrix("Matrix");
     m_pShadingObj = pDict->GetElementValue("Shading");
     if (parentMatrix) {
       m_Pattern2Form.Concat(*parentMatrix);
     }
   } else {
     m_pShadingObj = pPatternObj;
   }
   m_ShadingType = kInvalidShading;
   m_pCS = NULL;
@@ skipping 222 matching lines @@
       }
     }
     stream.m_BitStream.SkipBits(stream.m_nComps * stream.m_nCompBits *
                                 color_count);
     if (bGouraud)
       stream.m_BitStream.ByteAlign();
   }
   rect.Transform(pMatrix);
   return rect;
 }