Adding DRP specfic UMA for FirstContentfulPaint

content/browser/loader/resource_loader_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/loader/resource_loader.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 564 matching lines @@
         rfh->GetProcess()->GetID(), rfh->GetRenderViewHost()->GetRoutingID(),
         rfh->GetRoutingID(), true /* is_main_frame */,
         false /* parent_is_main_frame */, true /* allow_download */,
         false /* is_async */, false /* is_using_lofi_ */);
     scoped_ptr<ResourceHandlerStub> resource_handler(
         new ResourceHandlerStub(request.get()));
     raw_ptr_resource_handler_ = resource_handler.get();
     loader_.reset(new ResourceLoader(
         std::move(request),
         WrapResourceHandler(std::move(resource_handler), raw_ptr_to_request_),
-        this));
+        this, nullptr, nullptr));
   }
 
   void SetUp() override {
     job_factory_.SetProtocolHandler("test", CreateProtocolHandler());
 
     browser_context_.reset(new TestBrowserContext());
     scoped_refptr<SiteInstance> site_instance =
         SiteInstance::Create(browser_context_.get());
     web_contents_.reset(
         TestWebContents::Create(browser_context_.get(), site_instance.get()));
@@ skipping 551 matching lines @@
   ASSERT_TRUE(
       CertStore::GetInstance()->RetrieveCert(deserialized.cert_id, &cert));
   EXPECT_TRUE(cert->Equals(GetTestCert().get()));
 
   EXPECT_EQ(kTestCertError, deserialized.cert_status);
   EXPECT_EQ(kTestConnectionStatus, deserialized.connection_status);
   EXPECT_EQ(kTestSecurityBits, deserialized.security_bits);
 }
 
 }  // namespace content