pdfviewer: measure mem usage, command line flags library.

experimental/PdfViewer/pdfparser/native/SkPdfNativeTokenizer.h

 #ifndef EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFNATIVETOKENIZER_H_
 #define EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFNATIVETOKENIZER_H_
 
 #include "SkTDArray.h"
 #include "SkTDict.h"
 #include <math.h>
 #include <string.h>
 
 class SkPdfMapper;
 class SkPdfDictionary;
@@ skipping 65 matching lines @@
 class SkPdfObject;
 
 class SkPdfAllocator {
 #define BUFFER_SIZE 1024
     SkTDArray<SkPdfObject*> fHistory;
     SkTDArray<void*> fHandles;
     SkPdfObject* fCurrent;
     int fCurrentUsed;
 
     SkPdfObject* allocBlock();
+    size_t fSizeInBytes;
 
 public:
     SkPdfAllocator() {
+        fSizeInBytes = sizeof(*this);
         fCurrent = allocBlock();
         fCurrentUsed = 0;
     }
 
     ~SkPdfAllocator();
 
     SkPdfObject* allocObject();
 
     // TODO(edisonn): free this memory in destructor, track the usage?
     void* alloc(size_t bytes) {
         void* data = malloc(bytes);
         fHandles.push(data);
+        fSizeInBytes += bytes;
         return data;
     }
+
+    size_t bytesUsed() {
+        return fSizeInBytes;
+    }
 };
 
 class SkNativeParsedPDF;
 unsigned char* nextObject(unsigned char* start, unsigned char* end, SkPdfObject* token, SkPdfAllocator* allocator, SkNativeParsedPDF* doc);
 
 enum SkPdfTokenType {
     kKeyword_TokenType,
     kObject_TokenType,
 };
 
@@ skipping 25 matching lines @@
     unsigned char* fUncompressedStreamStart;
     unsigned char* fUncompressedStream;
     unsigned char* fUncompressedStreamEnd;
 
     bool fEmpty;
     bool fHasPutBack;
     PdfToken fPutBack;
 };
 
 #endif  // EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFNATIVETOKENIZER_H_