Better error from pdfium_test when page too big to render.

fpdfsdk/src/fpdfview.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/fsdk_define.h"
 #include "../include/fsdk_mgr.h"
 #include "../include/fpdfview.h"
 #include "../include/fsdk_rendercontext.h"
 #include "../include/fpdf_progressive.h"
 #include "../include/fpdf_ext.h"
 #include "../../../core/src/fxcrt/fx_safe_types.h"
+#include "../../third_party/base/nonstd_unique_ptr.h"
 #include "../../third_party/base/numerics/safe_conversions_impl.h"
 
 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
 {
         if (pFileAccess)
                 m_FileAccess = *pFileAccess;
 }
 
 FX_BOOL CPDF_CustomAccess::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
 {
@@ skipping 566 matching lines @@
 
         FX_FLOAT device_x_f, device_y_f;
         page2device.Transform(((FX_FLOAT)page_x), ((FX_FLOAT)page_y), device_x_f, device_y_f);
 
         *device_x = FXSYS_round(device_x_f);
         *device_y = FXSYS_round(device_y_f);
 }
 
 DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_Create(int width, int height, int alpha)
 {
-        CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
-        pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32);
-        return pBitmap;
+    nonstd::unique_ptr<CFX_DIBitmap> pBitmap(new CFX_DIBitmap);
+    if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32)) {
+        return NULL;
+    }
+    return pBitmap.release();
 }
 
 DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width, int height, int format, void* first_scan, int stride)
 {
         FXDIB_Format fx_format;
         switch (format) {
                 case FPDFBitmap_Gray:
                         fx_format = FXDIB_8bppRgb;
                         break;
                 case FPDFBitmap_BGR:
@@ skipping 251 matching lines @@
     if (!buffer) {
         buflen = len;
     } else if (buflen >= len) {
         memcpy(buffer, utf16Name.c_str(), len);
         buflen = len;
     } else {
         buflen = -1;
     }
     return (FPDF_DEST)pDestObj;
 }