Move SkPdfContext into its own files.

experimental/PdfViewer/src/SkPdfContext.cpp

Index: experimental/PdfViewer/src/SkPdfContext.cpp
diff --git a/experimental/PdfViewer/src/SkPdfContext.cpp b/experimental/PdfViewer/src/SkPdfContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2ce01e75fabee85aaf47bc1d214c6fcac7c46452
--- /dev/null
+++ b/experimental/PdfViewer/src/SkPdfContext.cpp
@@ -0,0 +1,18 @@
+/*
+ * 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 "SkPdfContext.h"
+#include "SkPdfNativeTokenizer.h"
+
+SkPdfContext::SkPdfContext(SkPdfNativeDoc* doc)
+    : fPdfDoc(doc)
+    , fTmpPageAllocator(new SkPdfAllocator()) {
+}
+
+SkPdfContext::~SkPdfContext() {
+    delete fTmpPageAllocator;
+}