Replace std::map with std::pair for (origin, engagement) tuples in RenderFrameImpl.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 2132cb23060fef2c33c36566932275c1b7763222..21efe57f0f37660ad652ece9dac5ee413350e80f 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -765,7 +765,8 @@ class CONTENT_EXPORT RenderFrameImpl
   };
 
   typedef std::map<GURL, double> HostZoomLevels;
-  typedef std::map<url::Origin, blink::mojom::EngagementLevel> EngagementLevels;
+  typedef std::pair<url::Origin, blink::mojom::EngagementLevel>
+      EngagementOriginAndLevel;
 
   // Creates a new RenderFrame. |render_view| is the RenderView object that this
   // frame belongs to.
@@ -1343,7 +1344,7 @@ class CONTENT_EXPORT RenderFrameImpl
 #endif
 
   HostZoomLevels host_zoom_levels_;
-  EngagementLevels engagement_levels_;
+  EngagementOriginAndLevel engagement_level_;
 
   mojo::AssociatedBinding<blink::mojom::EngagementClient> engagement_binding_;
   mojo::Binding<mojom::Frame> frame_binding_;