Create PluginMetricsProvider class.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1201 matching lines @@
         'browser/metrics/metrics_services_manager.cc',
         'browser/metrics/metrics_services_manager.h',
         'browser/metrics/metrics_state_manager.cc',
         'browser/metrics/metrics_state_manager.h',
         'browser/metrics/network_stats_uploader.cc',
         'browser/metrics/network_stats_uploader.h',
         'browser/metrics/omnibox_metrics_provider.cc',
         'browser/metrics/omnibox_metrics_provider.h',
         'browser/metrics/perf_provider_chromeos.cc',
         'browser/metrics/perf_provider_chromeos.h',
+        'browser/metrics/plugin_metrics_provider.cc',
+        'browser/metrics/plugin_metrics_provider.h',
         'browser/metrics/thread_watcher.cc',
         'browser/metrics/thread_watcher.h',
         'browser/metrics/thread_watcher_android.cc',
         'browser/metrics/thread_watcher_android.h',
         'browser/metrics/time_ticks_experiment_win.cc',
         'browser/metrics/time_ticks_experiment_win.h',
         'browser/metrics/tracking_synchronizer.cc',
         'browser/metrics/tracking_synchronizer.h',
         'browser/metrics/tracking_synchronizer_observer.h',
         'browser/metrics/variations/generated_resources_map.h',
@@ skipping 1623 matching lines @@
             ['include', '^browser/policy/profile_policy_connector_factory.h'],
           ],
         }],
         ['enable_plugins==1', {
           'dependencies': [
             '../ppapi/ppapi_internal.gyp:ppapi_ipc',
           ],
         }, {  # enable_plugins==0
           'sources/': [
             ['exclude', '^browser/guest_view/web_view/plugin_permission_helper'],
+            ['exclude', '^browser/metrics/plugin_metrics_provider'],
             ['exclude', '^browser/pepper_'],
             ['exclude', '^browser/plugins/'],
             ['exclude', '^browser/renderer_host/pepper/'],
           ],
         }],
         ['safe_browsing==1', {
           'defines': [
             'FULL_SAFE_BROWSING',
           ],
         }],
@@ skipping 849 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }