Track plugin input event latency

ui/events/latency_info_nacl.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
-    '../build/common_untrusted.gypi',
-    'ipc.gypi',
+    '../../build/common_untrusted.gypi',
   ],
   'conditions': [
     ['disable_nacl==0 and disable_nacl_untrusted==0', {
       'targets': [
         {
-          'target_name': 'ipc_nacl',
+          'target_name': 'latency_info_nacl',
           'type': 'none',
+          'defines': [
+            'EVENTS_BASE_IMPLEMENTATION',
+          ],
+          'dependencies': [
+            '<(DEPTH)/base/base_nacl.gyp:base_nacl',
+            '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
+          ],
+          'include_dirs': [
+            '..',
+          ],
           'variables': {
-            'ipc_target': 1,
             'nacl_untrusted_build': 1,
-            'nlib_target': 'libipc_nacl.a',
+            'nlib_target': 'liblatency_info_nacl.a',
             'build_glibc': 0,
             'build_newlib': 0,
             'build_irt': 1,
           },
-          'dependencies': [
-            '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
-            '../base/base_nacl.gyp:base_nacl',
+          'sources': [
+            'latency_info.h',
+            'latency_info.cc',
           ],
         },
       ],
     }],
   ],
 }