Add a --startup option to generate combined traces for startup.

build/android/adb_profile_chrome_startup

Index: build/android/adb_profile_chrome_startup
diff --git a/chrome/browser/metro_utils/BUILD.gn b/build/android/adb_profile_chrome_startup
old mode 100644
new mode 100755
similarity index 50%
copy from chrome/browser/metro_utils/BUILD.gn
copy to build/android/adb_profile_chrome_startup
index 86a28875cc8bb6787a0807467adcbb3072e01ce0..56727ffbfb86d03be758560eb6baf0514e6c9ebd
--- a/chrome/browser/metro_utils/BUILD.gn
+++ b/build/android/adb_profile_chrome_startup
@@ -1,14 +1,8 @@
+#!/bin/bash
+#
 # 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.
-
-source_set("metro_utils") {
-  deps = [
-    "//base",
-    "//chrome/installer/util",
-  ]
-  sources = [
-    "metro_chrome_win.cc",
-    "metro_chrome_win.h",
-  ]
-}
+#
+# Profile android browsers startup.
+exec $(dirname $0)/../../tools/profile_chrome_startup.py $@

[pasko, 2015/01/27 17:00:24]

to properly handle spaces in directory names and arguments:
exec "$(dirname "$0")/../../tools/profile_chrome_startup.py" "$@"

[Benoit L, 2015/01/27 18:41:41]

Done.