Add functions to collect bookmarks from Pdfium

pdf/pdf_engine.h

Index: pdf/pdf_engine.h
diff --git a/pdf/pdf_engine.h b/pdf/pdf_engine.h
index cb53d3ec93be54d32ac0614b2f8363dc9e46be52..2bd46a25482bd552d62214ec0a64cd3fc6ec3881 100644
--- a/pdf/pdf_engine.h
+++ b/pdf/pdf_engine.h
@@ -24,6 +24,7 @@
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/size.h"
 #include "ppapi/cpp/url_loader.h"
+#include "ppapi/cpp/var_dictionary.h"
 
 namespace pp {
 class InputEvent;
@@ -247,6 +248,9 @@ class PDFEngine {
   // Returns number of copies to be printed.
   virtual int GetCopiesToPrint() = 0;
 
+  // Returns a nested Dictionary of Bookmarks

[Sam McNally, 2014/12/16 05:58:34]

Document the structure of the dictionary.

[Alexandre Carlton, 2014/12/16 22:14:51]

Done.

+  virtual pp::VarDictionary GetBookmarks() = 0;
+
   // Append blank pages to make a 1-page document to a |num_pages| document.
   // Always retain the first page data.
   virtual void AppendBlankPages(int num_pages) = 0;