Provide WebContents::CreateParams to tab helpers.

chrome/browser/page_load_metrics/metrics_web_contents_observer_unittest.cc

 // Copyright 2015 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 "chrome/browser/page_load_metrics/metrics_web_contents_observer.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 186 matching lines @@
   }
 
   void AttachObserver() {
     embedder_interface_ =
         new TestPageLoadMetricsEmbedderInterface(web_contents());
     // Owned by the web_contents. Tests must be careful not to call
     // SimulateTimingUpdate after they call DeleteContents() without also
     // calling AttachObserver() again. Otherwise they will use-after-free the
     // observer_.
     observer_ = MetricsWebContentsObserver::CreateForWebContents(
-        web_contents(), base::WrapUnique(embedder_interface_));
+        web_contents(), base::nullopt, base::WrapUnique(embedder_interface_));
     observer_->WasShown();
   }
 
   void CheckErrorEvent(InternalErrorLoadEvent error, int count) {
     histogram_tester_.ExpectBucketCount(internal::kErrorEvents, error, count);
     num_errors_ += count;
   }
 
   void CheckTotalErrorEvents() {
     histogram_tester_.ExpectTotalCount(internal::kErrorEvents, num_errors_);
@@ skipping 583 matching lines @@
   ASSERT_EQ(2, CountUpdatedTimingReported());
   ASSERT_EQ(0, CountEmptyCompleteTimingReported());
 
   ASSERT_EQ(1, CountUpdatedSubFrameTimingReported());
   EXPECT_TRUE(subframe_timing.Equals(*updated_subframe_timings().back()));
 
   CheckNoErrorEvents();
 }
 
 }  // namespace page_load_metrics