[part 1] Make classes and structures in modules/ fast-allocated.

Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h

Index: Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h
diff --git a/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h b/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h
index a1c0505e3a9bb5c16c99045e1283536e221a205b..96ecf146eb6a910600dacab61048c1c7730852c4 100644
--- a/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h
+++ b/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.h
@@ -15,15 +15,13 @@
 namespace blink {
 
 class NavigatorRequestMediaKeySystemAccess {
+    STATIC_ONLY(NavigatorRequestMediaKeySystemAccess);
 public:
     static ScriptPromise requestMediaKeySystemAccess(
         ScriptState*,
         Navigator&,
         const String& keySystem,
         const HeapVector<MediaKeySystemConfiguration>& supportedConfigurations);
-
-private:
-    NavigatorRequestMediaKeySystemAccess();
 };
 
 } // namespace blink