Add a scroll offset to PDF documents to account for the top material design toolbar.

pdf/out_of_process_instance.h

Index: pdf/out_of_process_instance.h
diff --git a/pdf/out_of_process_instance.h b/pdf/out_of_process_instance.h
index 8a3de66e2e7ba476607dcea2ac0c613371e1811e..1215f192bcf34c8c94220a8bcf9944676bcd8842 100644
--- a/pdf/out_of_process_instance.h
+++ b/pdf/out_of_process_instance.h
@@ -333,6 +333,10 @@ class OutOfProcessInstance : public pp::Instance,
   // The background color of the PDF viewer.
   uint32 background_color_;
 
+  // The blank space above the first page of the document reserved for the
+  // toolbar.
+  int top_toolbar_height_;
+
   DISALLOW_COPY_AND_ASSIGN(OutOfProcessInstance);
 };