Fix GN bootstrap

TBR=brettw

Bug: none
Change-Id: I6586659a1a817186029ce989fd3397c49fb483f5
Reviewed-on: https://chromium-review.googlesource.com/587927
Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#489764}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 84d9cc2d5491706d638ac887f4e065a75f7cb87d
diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index 1390560..ff2ae57 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -449,6 +449,7 @@
       'base/metrics/histogram_base.cc',
       'base/metrics/histogram_functions.cc',
       'base/metrics/histogram_samples.cc',
+      'base/metrics/histogram_snapshot_manager.cc',
       'base/metrics/metrics_hashes.cc',
       'base/metrics/persistent_histogram_allocator.cc',
       'base/metrics/persistent_memory_allocator.cc',
@@ -534,7 +535,7 @@
       'base/trace_event/heap_profiler_allocation_context_tracker.cc',
       'base/trace_event/heap_profiler_allocation_register.cc',
       'base/trace_event/heap_profiler_event_filter.cc',
-      'base/trace_event/heap_profiler_event_writer.cc',
+      'base/trace_event/heap_profiler_heap_dump_writer.cc',
       'base/trace_event/heap_profiler_serialization_state.cc',
       'base/trace_event/heap_profiler_stack_frame_deduplicator.cc',
       'base/trace_event/heap_profiler_type_name_deduplicator.cc',