Add a startup benchmark and rudimentary scripts for running benchmarks.

mojo/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//mojo/public/mojo.gni")
 
 # TODO(beng): this meta target should probably move to the root dir's BUILD.gn.
 group("mojo") {
   # Meta-target, don't link into production code.
   testonly = true
   declare_args() {
     mojo_use_go = false
   }
   deps = [
     ":tests",
+    "//benchmarks",
     "//examples",
     "//mojo/common",
     "//mojo/public",
     "//mojo/services",
     "//mojo/tools/package_manager",
     "//services",
   ]
 
   if (use_prebuilt_mojo_shell) {
     deps += [ "//mojo/public/tools:copy_mojo_shell" ]
@@ skipping 82 matching lines @@
     sources = [
       "android/javatests/src/org/chromium/mojo/MojoTestCase.java",
       "android/javatests/src/org/chromium/mojo/bindings/ValidationTestUtil.java",
       "android/system/src/org/chromium/mojo/system/impl/CoreImpl.java",
       "services/native_viewport/android/src/org/chromium/mojo/PlatformViewportAndroid.java",
     ]
 
     jni_package = "mojo"
   }
 }