pdfviewer: fix font rotation issues

experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.cpp

 #include "SkNativeParsedPDF.h"
 #include "SkPdfNativeTokenizer.h"
 #include "SkPdfBasics.h"
 #include "SkPdfObject.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ skipping 72 matching lines @@
 }
 
 SkNativeParsedPDF::SkNativeParsedPDF(const char* path)
         : fAllocator(new SkPdfAllocator())
         , fFileContent(NULL)
         , fContentLength(0)
         , fRootCatalogRef(NULL)
         , fRootCatalog(NULL) {
     gDoc = this;
     FILE* file = fopen(path, "r");
-    size_t size = getFileSize(path);
-    void* content = sk_malloc_throw(size);
-    bool ok = (0 != fread(content, size, 1, file));
-    fclose(file);
-    file = NULL;
+    // TODO(edisonn): put this in a function that can return NULL
+    if (file) {
+        size_t size = getFileSize(path);
+        void* content = sk_malloc_throw(size);
+        bool ok = (0 != fread(content, size, 1, file));
+        fclose(file);
+        if (!ok) {
+            sk_free(content);
+            // TODO(edisonn): report read error
+            // TODO(edisonn): not nice to return like this from constructor, create a static
+            // function that can report NULL for failures.
+            return;  // Doc will have 0 pages
+        }
 
-    if (!ok) {
-        sk_free(content);
-        // TODO(edisonn): report read error
-        // TODO(edisonn): not nice to return like this from constructor, create a static
-        // function that can report NULL for failures.
-        return;  // Doc will have 0 pages
+        init(content, size);
     }
-
-    init(content, size);
 }
 
 void SkNativeParsedPDF::init(const void* bytes, size_t length) {
     fFileContent = (const unsigned char*)bytes;
     fContentLength = length;
     const unsigned char* eofLine = lineHome(fFileContent, fFileContent + fContentLength - 1);
     const unsigned char* xrefByteOffsetLine = previousLineHome(fFileContent, eofLine);
     const unsigned char* xrefstartKeywordLine = previousLineHome(fFileContent, xrefByteOffsetLine);
 
     if (strcmp((char*)xrefstartKeywordLine, "startxref") != 0) {
@@ skipping 438 matching lines @@
     return (SkPdfObject*)ref;
 }
 
 size_t SkNativeParsedPDF::bytesUsed() const {
     return fAllocator->bytesUsed() +
            fContentLength +
            fObjects.count() * sizeof(PublicObjectEntry) +
            fPages.count() * sizeof(SkPdfPageObjectDictionary*) +
            sizeof(*this);
 }