Cleanup unused param in PLMTestUtil

Cleanup an unused argument. Make function definition match the
declaration.

Change-Id: I5361ebcc56e660b4e697f50a866798ea5c89fad6
Reviewed-on: https://chromium-review.googlesource.com/c/1372429
Commit-Queue: John Delaney <johnidel@chromium.org>
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615735}

chrome/common/page_load_metrics/test/page_load_metrics_test_util.cc

@@ -88,7 +88,6 @@ void PopulateRequiredTimingFields(
 page_load_metrics::mojom::ResourceDataUpdatePtr CreateResource(
     bool was_cached,
     int64_t delta_bytes,
-    int64_t delta_body_bytes,
     int64_t encoded_body_length,
     bool is_complete) {
   auto resource_data_update =
@@ -105,18 +104,16 @@ GetSampleResourceDataUpdateForTesting(int64_t resource_size) {
   // Prepare 3 resources of varying configurations.
   std::vector<page_load_metrics::mojom::ResourceDataUpdatePtr> resources;
   // Cached resource.
-  resources.push_back(CreateResource(
-      true /* was_cached */, 0 /* delta_bytes */, 0 /* delta_body_bytes */,
-      resource_size /* encoded_body_length */, true /* is_complete */));
+  resources.push_back(CreateResource(true /* was_cached */, 0 /* delta_bytes */,
+                                     resource_size /* encoded_body_length */,
+                                     true /* is_complete */));
   // Uncached resource.
   resources.push_back(CreateResource(
       false /* was_cached */, resource_size /* delta_bytes */,
-      resource_size /* delta_body_bytes */,
       resource_size /* encoded_body_length */, true /* is_complete */));
   // Uncached, unfinished, resource.
   resources.push_back(
       CreateResource(false /* was_cached */, resource_size /* delta_bytes */,
-                     resource_size /* delta_body_bytes */,
                      0 /* encoded_body_length */, false /* is_complete */));
   return resources;
 }