Add v8.log visualizer page.

tools/plot-timer-events

Index: tools/plot-timer-events
diff --git a/tools/plot-timer-events b/tools/plot-timer-events
index 221684d4258bf9185418ee4085e95eae5b873ed5..0723150be5730b4414ad7843ae0b56002dacc16c 100755
--- a/tools/plot-timer-events
+++ b/tools/plot-timer-events
@@ -62,9 +62,9 @@ if [[ "$@" != *--distortion* ]]; then
   echo $options
 fi
 
-echo -e "plot-range,$plot_range\ndistortion,$distortion" | cat - $log_file |
+cat $log_file |
     $d8_exec $tools_path/csvparser.js $tools_path/splaytree.js \
     $tools_path/codemap.js $tools_path/profile.js $tools_path/profile_view.js \
     $tools_path/logreader.js $tools_path/tickprocessor.js \
-    $tools_path/plot-timer-events.js -- $options $@ | less \
-    2>/dev/null | gnuplot > timer-events.png
+    $tools_path/profviz/composer.js $tools_path/profviz/stdio.js \
+    -- $@ $options 2>/dev/null | gnuplot > timer-events.png