pdfviewer: improve memory usage, improve parse time (by 30-50%) and don't allocate extra buffers (more to do, but low priority now), and put the page specific memory in an allocator.

Review URL: https://codereview.chromium.org/19793011

git-svn-id: http://skia.googlecode.com/svn/trunk@10282 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/SkPdfBasics.cpp b/experimental/PdfViewer/SkPdfBasics.cpp
index e69de29..e345f48 100644
--- a/experimental/PdfViewer/SkPdfBasics.cpp
+++ b/experimental/PdfViewer/SkPdfBasics.cpp
@@ -0,0 +1,12 @@
+#include "SkPdfBasics.h"
+#include "SkPdfNativeTokenizer.h"
+
+PdfContext::PdfContext(SkNativeParsedPDF* doc)
+    : fPdfDoc(doc)
+    , fTmpPageAllocator(new SkPdfAllocator()) {
+}
+
+PdfContext::~PdfContext() {
+    delete fTmpPageAllocator;
+}
+