Split fpdfsdk/fsdk_annothandler.h into individual classes.

fpdfsdk/include/cpdfsdk_annotiterator.h

Index: fpdfsdk/include/cpdfsdk_annotiterator.h
diff --git a/fpdfsdk/include/cpdfsdk_annotiterator.h b/fpdfsdk/include/cpdfsdk_annotiterator.h
new file mode 100644
index 0000000000000000000000000000000000000000..f0fb8728178c7a8b4cc23785656acb04c248fda0
--- /dev/null
+++ b/fpdfsdk/include/cpdfsdk_annotiterator.h
@@ -0,0 +1,31 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef FPDFSDK_INCLUDE_CPDFSDK_ANNOTITERATOR_H_
+#define FPDFSDK_INCLUDE_CPDFSDK_ANNOTITERATOR_H_
+
+#include <vector>
+
+class CPDFSDK_Annot;
+class CPDFSDK_PageView;
+
+class CPDFSDK_AnnotIterator {
+ public:
+  CPDFSDK_AnnotIterator(CPDFSDK_PageView* pPageView, bool bReverse);
+  ~CPDFSDK_AnnotIterator();
+
+  CPDFSDK_Annot* Next();
+
+ private:
+  CPDFSDK_Annot* NextAnnot();
+  CPDFSDK_Annot* PrevAnnot();
+
+  std::vector<CPDFSDK_Annot*> m_iteratorAnnotList;
+  const bool m_bReverse;
+  std::size_t m_pos;
+};
+
+#endif  // FPDFSDK_INCLUDE_CPDFSDK_ANNOTITERATOR_H_