Use chromium trace_event implementation in blink

third_party/WebKit/Source/platform/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
@@ skipping 209 matching lines @@
     "Cursor.cpp",
     "Cursor.h",
     "DateComponents.cpp",
     "DateComponents.h",
     "Decimal.cpp",
     "Decimal.h",
     "DragImage.cpp",
     "DragImage.h",
     "EventDispatchForbiddenScope.cpp",
     "EventDispatchForbiddenScope.h",
-    "EventTracer.cpp",
-    "EventTracer.h",
     "FileChooser.cpp",
     "FileChooser.h",
     "FileMetadata.cpp",
     "FileMetadata.h",
     "FileSystemType.h",
     "Histogram.cpp",
     "Histogram.h",
     "HostWindow.h",
     "KeyboardCodes.h",
     "KillRing.h",
@@ skipping 63 matching lines @@
     "SharedBufferChunkReader.h",
     "StorageQuotaCallbacks.h",
     "Supplementable.cpp",
     "Supplementable.h",
     "Theme.cpp",
     "Theme.h",
     "ThemeTypes.h",
     "Timer.cpp",
     "Timer.h",
     "TraceEvent.h",
-    "TraceEventCommon.h",
     "TracedValue.cpp",
     "TracedValue.h",
     "UUID.cpp",
     "UUID.h",
     "UserGestureIndicator.cpp",
     "UserGestureIndicator.h",
     "WaitableEvent.cpp",
     "WaitableEvent.h",
     "WebIconSizesParser.cpp",
     "WebScheduler.cpp",
@@ skipping 1625 matching lines @@
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//cc/surfaces:surface_id",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }