Right clicking outside of a selected area should deselect text and bring up the correct context men…

pdf/pdfium/pdfium_engine.h

Index: pdf/pdfium/pdfium_engine.h
diff --git a/pdf/pdfium/pdfium_engine.h b/pdf/pdfium/pdfium_engine.h
index 11d304a8379bcdd9ed2fa89cb9216b053ac1d4f8..960c5f2f7f3ae80c7badeccdd3ff729e3f071271 100644
--- a/pdf/pdfium/pdfium_engine.h
+++ b/pdf/pdfium/pdfium_engine.h
@@ -246,6 +246,10 @@ class PDFiumEngine : public PDFEngine,
   // PDFiumPage because we might not have that structure when we need this.
   pp::Size GetPageSize(int index);
 
+  void GetAllScreenRectsUnion(std::vector<PDFiumRange>* rect_range,
+                              const pp::Point& offset_point,
+                              std::vector<pp::Rect>* rect_vector);
+
   void UpdateTickMarks();
 
   // Called to continue searching so we don't block the main thread.