Make classes and structures in core/html fast-allocated.

Source/core/html/track/AutomaticTrackSelection.h

Index: Source/core/html/track/AutomaticTrackSelection.h
diff --git a/Source/core/html/track/AutomaticTrackSelection.h b/Source/core/html/track/AutomaticTrackSelection.h
index b9f25e4f890d40edd11fc70e1152d20b19c2534a..0734ccf0c86cf822a6a9d996952a00414270c114 100644
--- a/Source/core/html/track/AutomaticTrackSelection.h
+++ b/Source/core/html/track/AutomaticTrackSelection.h
@@ -7,6 +7,7 @@
 
 #include "core/html/track/TextTrackKindUserPreference.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
@@ -17,6 +18,7 @@ class AutomaticTrackSelection {
     STACK_ALLOCATED();
 public:
     struct Configuration {
+        DISALLOW_ALLOCATION();
         Configuration()
             : disableCurrentlyEnabledTracks(false)
             , forceEnableSubtitleOrCaptionTrack(false)