Add trace event for complete network request

third_party/WebKit/Source/platform/tracing/NetworkInstrumentation.cpp

Index: third_party/WebKit/Source/platform/tracing/NetworkInstrumentation.cpp
diff --git a/third_party/WebKit/Source/platform/tracing/NetworkInstrumentation.cpp b/third_party/WebKit/Source/platform/tracing/NetworkInstrumentation.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c34423b804da6da4ce1aefbba0ab2397478aa5ef
--- /dev/null
+++ b/third_party/WebKit/Source/platform/tracing/NetworkInstrumentation.cpp
@@ -0,0 +1,24 @@
+// Copyright 2016 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.
+
+#include "platform/tracing/NetworkInstrumentation.h"
+
+#include "base/trace_event/trace_event.h"
+
+namespace network_instrumentation {
+
+const char kResourceLoadTitle[] = "ResourceLoad";
+using network_instrumentation::kNetInstrumentationCategory;
+
+void beginResourceLoad(unsigned long resourceID, const char* url) {
+  TRACE_EVENT_ASYNC_BEGIN1(kNetInstrumentationCategory, kResourceLoadTitle,

[chiniforooshan, 2016/10/24 19:25:37]

I think it is recommended that new codes use nestable async events.

[caseq, 2016/10/24 22:47:46]

+1

[dproy, 2016/11/03 15:13:37]

Done.

+                           resourceID, "url", TRACE_STR_COPY(url));

[chiniforooshan, 2016/10/24 19:25:37]

TRACE_ID_WITH_SCOPE(kBlinkResourceID, TRACE_ID_LOCAL(resourceID))

[dproy, 2016/11/03 15:13:37]

Done.

+}
+
+void endResourceLoad(unsigned long resourceID) {
+  TRACE_EVENT_ASYNC_END0(kNetInstrumentationCategory, kResourceLoadTitle,
+                         resourceID);
+}
+
+}  // namespace network_instrumentation