Add UMA metric: Startup.BrowserMainToRendererMain.

content/content_renderer.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
     '../cc/cc.gyp:cc',
     '../cc/blink/cc_blink.gyp:cc_blink',
+    '../components/components.gyp:startup_metric_utils_common',
     '../components/components.gyp:webusb',
     '../components/scheduler/scheduler.gyp:scheduler',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
     '../device/battery/battery.gyp:device_battery',
     '../device/battery/battery.gyp:device_battery_mojo_bindings',
     '../device/vibration/vibration.gyp:device_vibration',
     '../device/vibration/vibration.gyp:device_vibration_mojo_bindings',
     '../gin/gin.gyp:gin',
     '../gpu/gpu.gyp:gpu',
     '../jingle/jingle.gyp:jingle_glue',
@@ skipping 903 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }