Adding DRP specfic UMA for FirstContentfulPaint

content/browser/loader/resource_loader.cc

Index: content/browser/loader/resource_loader.cc
diff --git a/content/browser/loader/resource_loader.cc b/content/browser/loader/resource_loader.cc
index eee044c6aaf87a0119371de0a8722a239657692f..c831fc848ffb7a052e37201a6cb49e7c95f673fe 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -19,20 +19,21 @@
 #include "content/browser/loader/detachable_resource_handler.h"
 #include "content/browser/loader/resource_loader_delegate.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/service_worker/service_worker_request_handler.h"
 #include "content/browser/ssl/ssl_client_auth_handler.h"
 #include "content/browser/ssl/ssl_manager.h"
 #include "content/browser/ssl/ssl_policy.h"
 #include "content/common/ssl_status_serialization.h"
 #include "content/public/browser/cert_store.h"
 #include "content/public/browser/resource_context.h"
+#include "content/public/browser/resource_dispatcher_host_delegate.h"
 #include "content/public/browser/resource_dispatcher_host_login_delegate.h"
 #include "content/public/browser/signed_certificate_timestamp_store.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/process_type.h"
 #include "content/public/common/resource_response.h"
 #include "content/public/common/security_style.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
@@ -75,40 +76,46 @@ void GetSSLStatusForRequest(const GURL& url,
   StoreSignedCertificateTimestamps(ssl_info.signed_certificate_timestamps,
                                    child_id, &signed_certificate_timestamp_ids);
 
   *ssl_status = SSLStatus(SSLPolicy::GetSecurityStyleForResource(
                               url, cert_id, ssl_info.cert_status),
                           cert_id, signed_certificate_timestamp_ids, ssl_info);
 }
 
 void PopulateResourceResponse(ResourceRequestInfoImpl* info,
                               net::URLRequest* request,
+                              ResourceDispatcherHostDelegate* host_delegate,
+                              ResourceContext* resource_context,
                               ResourceResponse* response) {
   response->head.request_time = request->request_time();
   response->head.response_time = request->response_time();
   response->head.headers = request->response_headers();
   request->GetCharset(&response->head.charset);
   response->head.content_length = request->GetExpectedContentSize();
   request->GetMimeType(&response->head.mime_type);
   net::HttpResponseInfo response_info = request->response_info();
   response->head.was_fetched_via_spdy = response_info.was_fetched_via_spdy;
   response->head.was_npn_negotiated = response_info.was_npn_negotiated;
   response->head.npn_negotiated_protocol =
       response_info.npn_negotiated_protocol;
   response->head.connection_info = response_info.connection_info;
   response->head.was_fetched_via_proxy = request->was_fetched_via_proxy();
   response->head.proxy_server = response_info.proxy_server;
   response->head.socket_address = request->GetSocketAddress();
   const content::ResourceRequestInfo* request_info =
       content::ResourceRequestInfo::ForRequest(request);
   if (request_info)
     response->head.is_using_lofi = request_info->IsUsingLoFi();
+  response->head.used_data_reduction_proxy =
+      resource_context && host_delegate &&
+      host_delegate->UsedDataReductionProxy(request->proxy_server(),
+                                            resource_context);
   if (ServiceWorkerRequestHandler* handler =
           ServiceWorkerRequestHandler::GetHandler(request)) {
     handler->GetExtraResponseInfo(&response->head);
   }
   AppCacheInterceptor::GetExtraResponseInfo(
       request, &response->head.appcache_id,
       &response->head.appcache_manifest_url);
   if (info->is_load_timing_enabled())
     request->GetLoadTimingInfo(&response->head.load_timing);
 
@@ -126,25 +133,29 @@ void PopulateResourceResponse(ResourceRequestInfoImpl* info,
     DCHECK_EQ(request->ssl_info().security_bits, -1);
     DCHECK_EQ(request->ssl_info().key_exchange_info, 0);
     DCHECK(!request->ssl_info().connection_status);
   }
 }
 
 }  // namespace
 
 ResourceLoader::ResourceLoader(scoped_ptr<net::URLRequest> request,
                                scoped_ptr<ResourceHandler> handler,
-                               ResourceLoaderDelegate* delegate)
+                               ResourceLoaderDelegate* delegate,
+                               ResourceDispatcherHostDelegate* host_delegate,
+                               ResourceContext* resource_context)
     : deferred_stage_(DEFERRED_NONE),
       request_(std::move(request)),
       handler_(std::move(handler)),
       delegate_(delegate),
+      host_delegate_(host_delegate),
+      resource_context_(resource_context),
       is_transferring_(false),
       times_cancelled_before_request_start_(0),
       started_request_(false),
       times_cancelled_after_request_start_(0),
       weak_ptr_factory_(this) {
   request_->set_delegate(this);
   handler_->SetController(this);
 }
 
 ResourceLoader::~ResourceLoader() {
@@ -259,21 +270,22 @@ void ResourceLoader::OnReceivedRedirect(net::URLRequest* unused,
 
   delegate_->DidReceiveRedirect(this, redirect_info.new_url);
 
   if (delegate_->HandleExternalProtocol(this, redirect_info.new_url)) {
     // The request is complete so we can remove it.
     CancelAndIgnore();
     return;
   }
 
   scoped_refptr<ResourceResponse> response(new ResourceResponse());
-  PopulateResourceResponse(info, request_.get(), response.get());
+  PopulateResourceResponse(info, request_.get(), host_delegate_,
+                           resource_context_, response.get());
   if (!handler_->OnRequestRedirected(redirect_info, response.get(), defer)) {
     Cancel();
   } else if (*defer) {
     deferred_stage_ = DEFERRED_REDIRECT;  // Follow redirect when resumed.
   }
 }
 
 void ResourceLoader::OnAuthRequired(net::URLRequest* unused,
                                     net::AuthChallengeInfo* auth_info) {
   DCHECK_EQ(request_.get(), unused);
@@ -531,21 +543,22 @@ void ResourceLoader::CancelRequestInternal(int error, bool from_renderer) {
     // this request.
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(&ResourceLoader::ResponseCompleted,
                               weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
 void ResourceLoader::CompleteResponseStarted() {
   ResourceRequestInfoImpl* info = GetRequestInfo();
   scoped_refptr<ResourceResponse> response(new ResourceResponse());
-  PopulateResourceResponse(info, request_.get(), response.get());
+  PopulateResourceResponse(info, request_.get(), host_delegate_,
+                           resource_context_, response.get());
 
   delegate_->DidReceiveResponse(this);
 
   // TODO(darin): Remove ScopedTracker below once crbug.com/475761 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION("475761 OnResponseStarted()"));
 
   bool defer = false;
   if (!handler_->OnResponseStarted(response.get(), &defer)) {
     Cancel();