PDF: add support for named destinations.

include/core/SkAnnotation.h

Index: include/core/SkAnnotation.h
===================================================================
--- include/core/SkAnnotation.h	(revision 8005)
+++ include/core/SkAnnotation.h	(working copy)
@@ -14,6 +14,7 @@
 class SkDataSet;
 class SkStream;
 class SkWStream;
+struct SkPoint;
 
 /**
  *  Experimental class for annotating draws. Do not use directly yet.
@@ -64,6 +65,18 @@
      *  Returns the canonical key whose payload is a URL
      */
     static const char* URL_Key();
+
+    /**
+     *  Returns the canonical key whose payload is the name of a destination to
+     *  be defined.
+     */
+    static const char* Define_Named_Dest_Key();
+
+    /**
+     *  Returns the canonical key whose payload is the name of a destination to
+     *  be linked to.
+     */
+    static const char* Link_Named_Dest_Key();
 };
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -86,4 +99,30 @@
  */
 SK_API void SkAnnotateRectWithURL(SkCanvas*, const SkRect&, SkData*);
 
+/**
+ *  Experimental!
+ *
+ *  Annotate the canvas by associating a name with the specified point.
+ *
+ *  If the backend of this canvas does not support annotations, this call is
+ *  safely ignored.
+ *
+ *  The caller is responsible for managing its ownership of the SkData.
+ */
+SK_API void SkAnnotateNamedDestination(SkCanvas*, const SkPoint&, SkData*);
+
+/**
+ *  Experimental!
+ *
+ *  Annotate the canvas by making the specified rectangle link to a named
+ *  destination.
+ *
+ *  If the backend of this canvas does not support annotations, this call is
+ *  safely ignored.
+ *
+ *  The caller is responsible for managing its ownership of the SkData.
+ */
+SK_API void SkAnnotateLinkToDestination(SkCanvas*, const SkRect&, SkData*);
+
+
 #endif