Enable ServerTiming support

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

Index: third_party/WebKit/Source/platform/network/HTTPParsers.h
diff --git a/third_party/WebKit/Source/platform/network/HTTPParsers.h b/third_party/WebKit/Source/platform/network/HTTPParsers.h
index 023d7d772102d9165e052a5231d0ff6deb4810f2..f042dcfa6dc49438606154a4c1836ba14c8d31c7 100644
--- a/third_party/WebKit/Source/platform/network/HTTPParsers.h
+++ b/third_party/WebKit/Source/platform/network/HTTPParsers.h
@@ -88,6 +88,17 @@ struct CacheControlHeader {
         max_age(0.0) {}
 };
 
+struct ServerTimingHeader {
+  String metric;
+  double duration;
+  String description;
+
+  ServerTimingHeader(String metric, double duration, String description)
+      : metric(metric), duration(duration), description(description) {}
+};
+
+using ServerTimingHeaderVector = Vector<std::unique_ptr<ServerTimingHeader>>;
+
 PLATFORM_EXPORT ContentDispositionType GetContentDispositionType(const String&);
 PLATFORM_EXPORT bool IsValidHTTPHeaderValue(const String&);
 PLATFORM_EXPORT bool IsValidHTTPFieldContentRFC7230(const String&);
@@ -169,6 +180,11 @@ PLATFORM_EXPORT bool ParseContentRangeHeaderFor206(const String& content_range,
                                                    int64_t* last_byte_position,
                                                    int64_t* instance_length);
 
+PLATFORM_EXPORT std::unique_ptr<ServerTimingHeaderVector>
+ParseServerTimingHeader(const String&);
+
+PLATFORM_EXPORT String CheckDoubleQuotedString(const String&);
+
 }  // namespace blink
 
 #endif