Allow plugins to participate in Chrome context menus.

webkit/plugins/ppapi/ppp_pdf.h

Index: webkit/plugins/ppapi/ppp_pdf.h
===================================================================
--- webkit/plugins/ppapi/ppp_pdf.h	(revision 117246)
+++ webkit/plugins/ppapi/ppp_pdf.h	(working copy)
@@ -12,10 +12,21 @@
 #define PPP_PDF_INTERFACE_1 "PPP_Pdf;1"
 #define PPP_PDF_INTERFACE PPP_PDF_INTERFACE_1
 
+typedef enum {
+  // Rotates the page 90 degrees clockwise from its current orientation.
+  PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW,
+  // Rotates the page 90 degrees counterclockwise from its current orientation.
+  PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW
+} PP_PrivatePageTransformType;
+PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_PrivatePageTransformType, 4);
+
 struct PPP_Pdf_1 {
   // Returns an absolute URL if the position is over a link.
   PP_Var (*GetLinkAtPosition)(PP_Instance instance,
                               PP_Point point);
+
+  // Requests that the plugin apply the given transform to its view.
+  void (*Transform)(PP_Instance instance, PP_PrivatePageTransformType type);
 };
 
 typedef PPP_Pdf_1 PPP_Pdf;