Make is_ad_related_ a bitfield and group it with the others

R=masonfreed@chromium.org

Change-Id: I885b95fb269e2f9f239233fedc825739b674b7e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2642858
Auto-Submit: Christian Biesinger <cbiesinger@chromium.org>
Commit-Queue: Mason Freed <masonfreed@chromium.org>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845783}

third_party/blink/renderer/core/html/html_image_element.cc

@@ -108,6 +108,7 @@ HTMLImageElement::HTMLImageElement(Document& document, bool created_by_parser)
           !GetExecutionContext()->IsFeatureEnabled(
               mojom::blink::DocumentPolicyFeature::kUnsizedMedia)),
       is_legacy_format_or_unoptimized_image_(false),
+      is_ad_related_(false),
       referrer_policy_(network::mojom::ReferrerPolicy::kDefault) {
   SetHasCustomStyleCallbacks();
 }

third_party/blink/renderer/core/html/html_image_element.h

@@ -260,13 +260,12 @@ class CORE_EXPORT HTMLImageElement final
   // policies. When any policy is violated, the image should be rendered as a
   // placeholder image.
   bool is_legacy_format_or_unoptimized_image_ : 1;
+  bool is_ad_related_ : 1;
 
   network::mojom::ReferrerPolicy referrer_policy_;
 
   std::unique_ptr<LazyLoadImageObserver::VisibleLoadTimeMetrics>
       visible_load_time_metrics_;
-
-  bool is_ad_related_ = false;
 };
 
 }  // namespace blink