fix last warnings on w64 and turn on w.a.e.

experimental/PdfViewer/pdfparser/native/SkPdfNativeDoc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPdfNativeDoc.h"
 
 #include <stdio.h>
@@ skipping 171 matching lines @@
             if (!token.isKeyword("obj")) {
                 SkPdfReport(kWarning_SkPdfIssueSeverity, kMissingToken_SkPdfIssue,
                             "Could not find obj", NULL, NULL);
                 continue;
             }
 
             while (fObjects.count() < id + 1) {
                 reset(fObjects.append());
             }
 
-            fObjects[id].fOffset = current - fFileContent;
+            fObjects[id].fOffset = SkToInt(current - fFileContent);
 
             SkPdfNativeObject* obj = fAllocator->allocObject();
             current = nextObject(current, end, obj, fAllocator, this);
 
             fObjects[id].fResolvedReference = obj;
             fObjects[id].fObj = obj;
             fObjects[id].fIsReferenceResolved = true;
         } else if (token.isKeyword("trailer")) {
             long dummy;
             current = readTrailer(current, end, true, &dummy, true);
@@ skipping 370 matching lines @@
     return (SkPdfNativeObject*)ref;
 }
 
 size_t SkPdfNativeDoc::bytesUsed() const {
     return fAllocator->bytesUsed() +
            fContentLength +
            fObjects.count() * sizeof(PublicObjectEntry) +
            fPages.count() * sizeof(SkPdfPageObjectDictionary*) +
            sizeof(*this);
 }