Add the UMA PLT.BeginToFinish{,Doc}_AfterPreconnectRequest

webkit/glue/weburlrequest_extradata_impl.h

Index: webkit/glue/weburlrequest_extradata_impl.h
diff --git a/webkit/glue/weburlrequest_extradata_impl.h b/webkit/glue/weburlrequest_extradata_impl.h
index 151c4845c36ecd965f87bea2bac4fd9084a9b7fb..79d5f13f8097e7a232b465a916da7e8570c3b9ad 100644
--- a/webkit/glue/weburlrequest_extradata_impl.h
+++ b/webkit/glue/weburlrequest_extradata_impl.h
@@ -18,6 +18,8 @@ namespace webkit_glue {
 class WEBKIT_COMMON_EXPORT WebURLRequestExtraDataImpl :
     public NON_EXPORTED_BASE(WebKit::WebURLRequest::ExtraData) {
  public:
+  static const int kType;
+
   // |custom_user_agent| is used to communicate an overriding custom user agent
   // to |RenderViewImpl::willSendRequest()|; set to a null string to indicate no
   // override and an empty string to indicate that there should be no user
@@ -32,11 +34,18 @@ class WEBKIT_COMMON_EXPORT WebURLRequestExtraDataImpl :
   const WebKit::WebString& custom_user_agent() const {
     return custom_user_agent_;
   }
+  int type_id() const { return type_id_; }

[jam, 2013/07/11 16:23:52]

hmm, seems best to avoid this hand rolled RTTI 

+
+ protected:
+  void set_type_id(int id) { type_id_ = id; }
 
  private:
   WebKit::WebReferrerPolicy referrer_policy_;
   WebKit::WebString custom_user_agent_;
 
+  // This is used to identify subclass of WebURLRequestExtraDataImpl.
+  int type_id_;
+
   DISALLOW_COPY_AND_ASSIGN(WebURLRequestExtraDataImpl);
 };