Add Battery Status API support in content/renderer and IPC messages.

content/content_common.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',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 122 matching lines @@
     'common/android/common_jni_registrar.h',
     'common/android/gin_java_bridge_value.cc',
     'common/android/gin_java_bridge_value.h',
     'common/android/hash_set.cc',
     'common/android/hash_set.h',
     'common/android/surface_texture_lookup.cc',
     'common/android/surface_texture_lookup.h',
     'common/android/surface_texture_peer.cc',
     'common/android/surface_texture_peer.h',
     'common/appcache_messages.h',
+    'common/battery_status_messages.h',
     'common/browser_plugin/browser_plugin_constants.cc',
     'common/browser_plugin/browser_plugin_constants.h',
     'common/browser_plugin/browser_plugin_messages.h',
     'common/cc_messages.cc',
     'common/cc_messages.h',
     'common/child_process_host_impl.cc',
     'common/child_process_host_impl.h',
     'common/child_process_messages.h',
     'common/child_process_sandbox_support_impl_linux.cc',
     'common/child_process_sandbox_support_impl_linux.h',
@@ skipping 608 matching lines @@
         'common/sandbox_linux/bpf_renderer_policy_linux.cc',
         'common/sandbox_linux/bpf_renderer_policy_linux.h',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.cc',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.h',
       ],
     }, {
       'defines': ['USE_SECCOMP_BPF'],
     }],
   ],
 }