Add second batch JS benchmark and code generator

tools/perf/page_sets/tough_scheduling_cases/generate_second_batch_js.sh

+#!/bin/sh
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+readonly LIGHT_OPTS="\
+    --closure-count=10 \
+    --function-count=10 \
+    --inner-function-count=10 \
+    --function-call-count=1 \
+    --closure-call-count=1 \
+    --inner-function-line-count=1 \
+    --loop-count=5"
+readonly MEDIUM_OPTS="\
+    --closure-count=50 \
+    --function-count=50 \
+    --inner-function-count=20 \
+    --function-call-count=5 \
+    --closure-call-count=5 \
+    --inner-function-line-count=2 \
+    --loop-count=5"
+readonly HEAVY_OPTS="\
+    --closure-count=200 \
+    --function-count=200 \
+    --inner-function-count=40 \
+    --function-call-count=10 \
+    --closure-call-count=10 \
+    --inner-function-line-count=3 \
+    --loop-count=5"
+
+function generate {
+  local generator="./second_batch_js_generator.py"
+  cat << EOF
+// Generated with $generator $@
+//
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+EOF
+  $generator $@ | yui-compressor --type js;
+}
+
+generate $LIGHT_OPTS > second_batch_js_light.min.js
+generate $MEDIUM_OPTS > second_batch_js_medium.min.js
+generate $HEAVY_OPTS > second_batch_js_heavy.min.js