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..06fa49fea815da5642aebf0c675c0dd4ecc6e63a 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -8,20 +8,21 @@
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "content/browser/appcache/appcache_interceptor.h"
 #include "content/browser/child_process_security_policy_impl.h"
+#include "content/browser/frame_host/navigation_user_data.h"
 #include "content/browser/loader/cross_site_resource_handler.h"
 #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"
@@ -121,21 +122,20 @@ void PopulateResourceResponse(ResourceRequestInfoImpl* info,
         net::IsCertStatusError(ssl_status.cert_status) &&
         !net::IsCertStatusMinorError(ssl_status.cert_status);
   } else {
     // We should not have any SSL state.
     DCHECK(!request->ssl_info().cert_status);
     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)
     : deferred_stage_(DEFERRED_NONE),
       request_(std::move(request)),
       handler_(std::move(handler)),
       delegate_(delegate),
       is_transferring_(false),
@@ -538,21 +538,20 @@ void ResourceLoader::CancelRequestInternal(int error, bool from_renderer) {
 void ResourceLoader::CompleteResponseStarted() {
   ResourceRequestInfoImpl* info = GetRequestInfo();
   scoped_refptr<ResourceResponse> response(new ResourceResponse());
   PopulateResourceResponse(info, request_.get(), 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();
   } else if (defer) {
     read_deferral_start_time_ = base::TimeTicks::Now();
     deferred_stage_ = DEFERRED_READ;  // Read first chunk when resumed.
   }
 }
 
 void ResourceLoader::StartReading(bool is_continuation) {