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

fpdfsdk/src/fsdk_mgr.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 <algorithm>
 
 #include "fpdfsdk/include/fsdk_mgr.h"
 
@@ skipping 560 matching lines @@
 
 void CPDFSDK_Document::OnCloseDocument() {
   KillFocusAnnot();
 }
 
 FX_BOOL CPDFSDK_Document::GetPermissions(int nFlag) {
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }
 
 IJS_Runtime* CPDFSDK_Document::GetJsRuntime() {
-  ASSERT(m_pEnv != NULL);
   return m_pEnv->GetJSRuntime();
 }
 
 CFX_WideString CPDFSDK_Document::GetPath() {
-  ASSERT(m_pEnv != NULL);
   return m_pEnv->JS_docGetFilePath();
 }
 
 CPDFSDK_PageView::CPDFSDK_PageView(CPDFSDK_Document* pSDKDoc,
                                    UnderlyingPageType* page)
     : m_page(page),
       m_pSDKDoc(pSDKDoc),
       m_CaptureWidget(nullptr),
       m_bEnterWidget(FALSE),
       m_bExitWidget(FALSE),
@@ skipping 323 matching lines @@
   CPDFSDK_Annot* pFocusAnnot = m_pSDKDoc->GetFocusAnnot();
   if (!pFocusAnnot)
     return nullptr;
 
   for (CPDFSDK_Annot* pAnnot : m_fxAnnotArray) {
     if (pAnnot == pFocusAnnot)
       return pAnnot;
   }
   return nullptr;
 }