PlzNavigate: Support ResourceTiming API

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

Index: third_party/WebKit/Source/platform/network/ResourceRequest.h
diff --git a/third_party/WebKit/Source/platform/network/ResourceRequest.h b/third_party/WebKit/Source/platform/network/ResourceRequest.h
index a43f60754a60f58a79bbd1ccf70706b6f0bdfd83..95182447027339eeac592e4019aafe908f107ea2 100644
--- a/third_party/WebKit/Source/platform/network/ResourceRequest.h
+++ b/third_party/WebKit/Source/platform/network/ResourceRequest.h
@@ -237,6 +237,9 @@ public:
     void setRedirectStatus(RedirectStatus status) { m_redirectStatus = status; }
     RedirectStatus redirectStatus() const { return m_redirectStatus; }
 
+    void setNavigationStartTime(double);
+    double navigationStartTime() const { return m_navigationStart; }
+
 private:
     void initialize(const KURL&);
 
@@ -283,6 +286,8 @@ private:
     static double s_defaultTimeoutInterval;
 
     RedirectStatus m_redirectStatus;
+
+    double m_navigationStart = 0;
 };
 
 struct CrossThreadResourceRequestData {