Metric-ify SystemHealth metrics

tracing/trace_viewer.gypi

 # Copyright (c) 2015 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': {
     'tracing_css_files': [
       'tracing/ui/base/line_chart.css',
       'tracing/ui/base/list_view.css',
       'tracing/ui/base/pie_chart.css',
@@ skipping 135 matching lines @@
       'tracing/extras/vsync/vsync_auditor.html',
       'tracing/importer/empty_importer.html',
       'tracing/importer/find_input_expectations.html',
       'tracing/importer/find_load_expectations.html',
       'tracing/importer/import.html',
       'tracing/importer/importer.html',
       'tracing/importer/proto_expectation.html',
       'tracing/importer/simple_line_reader.html',
       'tracing/importer/user_model_builder.html',
       'tracing/metrics/all_metrics.html',
+      'tracing/metrics/metric_registry.html',
       'tracing/metrics/system_health/animation_smoothness_metric.html',
       'tracing/metrics/system_health/animation_throughput_metric.html',
       'tracing/metrics/system_health/efficiency_metric.html',
       'tracing/metrics/system_health/responsiveness_metric.html',
       'tracing/metrics/system_health/utils.html',
       'tracing/model/activity.html',
       'tracing/model/alert.html',
       'tracing/model/annotation.html',
       'tracing/model/async_slice.html',
       'tracing/model/async_slice_group.html',
@@ skipping 259 matching lines @@
       'tracing/ui/tracks/track.html',
       'tracing/ui/view_specific_brushing_state.html',
       'tracing/value/generic_table.html',
       'tracing/value/histogram.html',
       'tracing/value/numeric.html',
       'tracing/value/time_display_mode.html',
       'tracing/value/ui/array_of_numbers_span.html',
       'tracing/value/ui/generic_table_view.html',
       'tracing/value/ui/preferred_display_unit.html',
       'tracing/value/ui/scalar_span.html',
-      'tracing/value/unit.html'
+      'tracing/value/unit.html',
+      'tracing/value/value.html'
     ],
     'tracing_img_files': [
       'tracing/ui/extras/chrome/cc/images/input-event.png',
       'tracing/ui/extras/chrome/gpu/images/checkerboard.png',
       'tracing/ui/images/chrome-left.png',
       'tracing/ui/images/chrome-mid.png',
       'tracing/ui/images/chrome-right.png',
       'tracing/ui/images/ui-states.png',
     ],
     'tracing_files': [
       '<@(tracing_css_files)',
       '<@(tracing_js_html_files)',
       '<@(tracing_img_files)',
     ],
   }
 }