[tracing] Support new heap dump format

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/list_view.css',
       'tracing/ui/extras/about_tracing/common.css',
       'tracing/ui/extras/chrome/cc/display_item_list_view.css',
@@ skipping 94 matching lines @@
       'tracing/extras/importer/ddms_importer.html',
       'tracing/extras/importer/etw/etw_importer.html',
       'tracing/extras/importer/etw/eventtrace_parser.html',
       'tracing/extras/importer/etw/parser.html',
       'tracing/extras/importer/etw/process_parser.html',
       'tracing/extras/importer/etw/thread_parser.html',
       'tracing/extras/importer/gcloud_trace/gcloud_trace_importer.html',
       'tracing/extras/importer/gzip_importer.html',
       'tracing/extras/importer/heap_dump_trace_event_importer.html',
       'tracing/extras/importer/jszip.html',
+      'tracing/extras/importer/legacy_heap_dump_trace_event_importer.html',
       'tracing/extras/importer/linux_perf/android_parser.html',
       'tracing/extras/importer/linux_perf/binder_parser.html',
       'tracing/extras/importer/linux_perf/bus_parser.html',
       'tracing/extras/importer/linux_perf/clock_parser.html',
       'tracing/extras/importer/linux_perf/cpufreq_parser.html',
       'tracing/extras/importer/linux_perf/disk_parser.html',
       'tracing/extras/importer/linux_perf/drm_parser.html',
       'tracing/extras/importer/linux_perf/exynos_parser.html',
       'tracing/extras/importer/linux_perf/ftrace_importer.html',
       'tracing/extras/importer/linux_perf/gesture_parser.html',
       'tracing/extras/importer/linux_perf/i2c_parser.html',
       'tracing/extras/importer/linux_perf/i915_parser.html',
       'tracing/extras/importer/linux_perf/irq_parser.html',
       'tracing/extras/importer/linux_perf/kfunc_parser.html',
       'tracing/extras/importer/linux_perf/mali_parser.html',
       'tracing/extras/importer/linux_perf/memreclaim_parser.html',
       'tracing/extras/importer/linux_perf/parser.html',
       'tracing/extras/importer/linux_perf/power_parser.html',
       'tracing/extras/importer/linux_perf/regulator_parser.html',
       'tracing/extras/importer/linux_perf/sched_parser.html',
       'tracing/extras/importer/linux_perf/sync_parser.html',
       'tracing/extras/importer/linux_perf/workqueue_parser.html',
+      'tracing/extras/importer/streaming_event_expander.html',
       'tracing/extras/importer/trace2html_importer.html',
       'tracing/extras/importer/trace_code_entry.html',
       'tracing/extras/importer/trace_code_map.html',
       'tracing/extras/importer/trace_event_importer.html',
       'tracing/extras/importer/v8/codemap.html',
       'tracing/extras/importer/v8/log_reader.html',
       'tracing/extras/importer/v8/splaytree.html',
       'tracing/extras/importer/v8/v8_log_importer.html',
       'tracing/extras/importer/zip_importer.html',
       'tracing/extras/lean_config.html',
@@ skipping 425 matching lines @@
       'tracing/ui/images/chrome-right.png',
       'tracing/ui/images/ui-states.png',
     ],
     'tracing_files': [
       '<@(tracing_css_files)',
       '<@(tracing_js_html_files)',
       '<@(tracing_img_files)',
     ],
   }
 }