pdf viewer: fix a few warnings, and enable warning as errors

experimental/PdfViewer/SkPdfParser.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 "SkCanvas.h"
 #include "SkDevice.h"
 #include "SkForceLinking.h"
@@ skipping 1887 matching lines @@
 // e.g. SkBitmap getPage(int page);
 //      int formsCount();
 //      SkForm getForm(int formID); // SkForm(SkRect, .. other data)
 // TODO (edisonn): Add intend when loading pdf, for example: for viewing, parsing all content, ...
 // if we load the first page, and we zoom to fit to screen horizontally, then load only those
 // resources needed, so the preview is fast.
 // TODO (edisonn): hide parser/tokenizer behind and interface and a query language, and resolve
 // references automatically.
 
 bool SkPdfViewer::load(const SkString inputFileName, SkPicture* out) {
-    std::cout << "Init: " << inputFileName.c_str() << std::endl;
+    std::cout << "PDF Loaded: " << inputFileName.c_str() << std::endl;
 
     SkNativeParsedPDF* doc = new SkNativeParsedPDF(inputFileName.c_str());
     if (!doc->pages())
     {
-        std::cout << "ERROR: Empty Document" << inputFileName.c_str() << std::endl;
+        std::cout << "ERROR: Empty PDF Document" << inputFileName.c_str() << std::endl;
         return false;
     } else {
 
         for (int pn = 0; pn < doc->pages(); ++pn) {
             // TODO(edisonn): implement inheritance properties as per PDF spec
             //SkRect rect = page->MediaBox();
             SkRect rect = doc->MediaBox(pn);
 
 #ifdef PDF_TRACE
             printf("Page Width: %f, Page Height: %f\n", SkScalarToDouble(rect.width()), SkScalarToDouble(rect.height()));
@@ skipping 24 matching lines @@
                 out[out.size() - 2] = 'n';
                 out[out.size() - 1] = 'g';
             }
             SkImageEncoder::EncodeFile(out.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
         }
         return true;
     }
 
     return true;
 }