Add trace event for complete network request

third_party/WebKit/Source/platform/network/NetworkInstrumentation.h

Index: third_party/WebKit/Source/platform/network/NetworkInstrumentation.h
diff --git a/third_party/WebKit/Source/platform/network/NetworkInstrumentation.h b/third_party/WebKit/Source/platform/network/NetworkInstrumentation.h
new file mode 100644
index 0000000000000000000000000000000000000000..e5c07ea036b5d1c3cd9e95e3dbef17bd60afee4c
--- /dev/null
+++ b/third_party/WebKit/Source/platform/network/NetworkInstrumentation.h
@@ -0,0 +1,42 @@
+// 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.
+
+#ifndef NetworkInstrumentation_h
+#define NetworkInstrumentation_h
+
+#include "platform/PlatformExport.h"
+#include "platform/network/ResourceLoadPriority.h"
+
+namespace blink {
+class ResourceRequest;
+}  // namespace blink
+
+namespace network_instrumentation {
+
+enum RequestOutcome { Success, Fail };
+
+class PLATFORM_EXPORT ScopedResourceLoadTracker {
+ public:
+  ScopedResourceLoadTracker(unsigned long resourceID,
+                            const blink::ResourceRequest&);
+  ~ScopedResourceLoadTracker();
+  void resourceLoadContinuesBeyondScope();
+
+ private:
+  // If this variable is false, close resource load slice at end of scope.
+  bool m_resourceLoadContinuesBeyondScope;
+
+  const unsigned long m_resourceID;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedResourceLoadTracker);
+};
+
+void PLATFORM_EXPORT resourcePrioritySet(unsigned long resourceID,
+                                         blink::ResourceLoadPriority);
+
+void PLATFORM_EXPORT endResourceLoad(unsigned long resourceID, RequestOutcome);
+
+}  // namespace network_instrumentation
+
+#endif  // NetworkInstrumentation_h