Revert "Revert of Add getReducedClipStack to lua canvas (https://codereview.chromium.org/180283004/…

tools/lua/dump_clipstack_at_restore.lua

 function sk_scrape_startcanvas(c, fileName)
     canvas = c
     clipstack = {}
     restoreCount = 0
 end
 
 function sk_scrape_endcanvas(c, fileName)
     canvas = nil
 end
 
 function sk_scrape_accumulate(t)
     if (t.verb == "restore") then
         restoreCount = restoreCount + 1;
-        io.write("Clip Stack at restore #", restoreCount, ":\n")
+        -- io.write("Clip Stack at restore #", restoreCount, ":\n")
+        io.write("Reduced Clip Stack at restore #", restoreCount, ":\n")
         for i = 1, #clipstack do
             local element = clipstack[i];
             io.write("\t", element["op"], ", ", element["type"], ", aa:", tostring(element["aa"]))
             if (element["type"] == "path") then
                 io.write(", fill: ", element["path"]:getFillType())
                 io.write(", segments: \"", element["path"]:getSegmentTypes(), "\"")
                 io.write(", convex:", tostring(element["path"]:isConvex()))
             end
             io.write("\n")
         end
         io.write("\n")
     else
-        clipstack = canvas:getClipStack()
+        -- clipstack = canvas:getClipStack()
+        clipstack = canvas:getReducedClipStack()
     end
 end
 
 function sk_scrape_summarize() end