add dumpops.lua as a sample scraper that just dumps the arguments

add SkLua.h for common utilities

BUG=
R=rmistry@google.com

Review URL: https://codereview.chromium.org/15737010

git-svn-id: http://skia.googlecode.com/svn/trunk@9242 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/lua/dumpops.lua b/tools/lua/dumpops.lua
new file mode 100644
index 0000000..1667e57
--- /dev/null
+++ b/tools/lua/dumpops.lua
@@ -0,0 +1,34 @@
+function tostr(t)
+    local str = ""
+    for k, v in next, t do
+        if #str > 0 then
+            str = str .. ", "
+        end
+        if type(k) == "number" then
+            str = str .. "[" .. k .. "] = "
+        else
+            str = str .. tostring(k) .. " = "
+        end
+        if type(v) == "table" then
+            str = str .. "{ " .. tostr(v) .. " }"
+        else
+            str = str .. tostring(v)
+        end
+    end
+    return str
+end
+
+function sk_scrape_startcanvas(c, fileName) end
+
+function sk_scrape_endcanvas(c, fileName) end
+
+function sk_scrape_accumulate(t)
+    -- dump the params in t, specifically showing the verb first, which we
+    -- then nil out so it doesn't appear in tostr()
+    io.write(t.verb, " ")
+    t.verb = nil
+    io.write(tostr(t), "\n")
+end
+
+function sk_scrape_summarize() end
+