Review and cleanup lint warnings.

core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.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 <limits.h>
 
 #include "core/include/fpdfapi/cpdf_document.h"
 #include "core/include/fpdfapi/fpdf_module.h"
@@ skipping 753 matching lines @@
   for (int i = 0; i < 4; i++) {
     pBBox->AddInteger(bbox[i]);
   }
   pFontDesc->SetAt("FontBBox", pBBox);
   pFontDesc->SetAtInteger("ItalicAngle", italicangle);
   pFontDesc->SetAtInteger("Ascent", ascend);
   pFontDesc->SetAtInteger("Descent", descend);
   pFontDesc->SetAtInteger("CapHeight", capheight);
   CGFloat fStemV = 0;
   int16_t min_width = SHRT_MAX;
+
   static const UniChar stem_chars[] = {'i', 'I', '!', '1'};
-  const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]);
-  CGGlyph glyphs[count];
-  CGRect boundingRects[count];
+  CGGlyph glyphs[FX_ArraySize(stem_chars)];
+  CGRect boundingRects[FX_ArraySize(stem_chars)];
+
+  const size_t count = FX_ArraySize(stem_chars);
   if (CTFontGetGlyphsForCharacters(font, stem_chars, glyphs, count)) {
     CTFontGetBoundingRectsForGlyphs(font, kCTFontHorizontalOrientation, glyphs,
                                     boundingRects, count);
     for (size_t i = 0; i < count; i++) {
       int16_t width = boundingRects[i].size.width;
       if (width > 0 && width < min_width) {
         min_width = width;
         fStemV = min_width;
       }
     }
@@ skipping 354 matching lines @@
 void FPDFAPI_FlatPageAttr(CPDF_Dictionary* pPageDict,
                           const CFX_ByteStringC& name) {
   if (pPageDict->KeyExist(name)) {
     return;
   }
   CPDF_Object* pObj = FPDFAPI_GetPageAttr(pPageDict, name);
   if (pObj) {
     pPageDict->SetAt(name, pObj->Clone());
   }
 }