[part 2] Make classes and structures in modules fast-allocated.

Source/modules/speech/testing/InternalsSpeechSynthesis.h

Index: Source/modules/speech/testing/InternalsSpeechSynthesis.h
diff --git a/Source/modules/speech/testing/InternalsSpeechSynthesis.h b/Source/modules/speech/testing/InternalsSpeechSynthesis.h
index f495ffffeeafbe09ae9622cdc54e145ee11b6dcf..f370375377299d7bbab027caa9c948b41de95842 100644
--- a/Source/modules/speech/testing/InternalsSpeechSynthesis.h
+++ b/Source/modules/speech/testing/InternalsSpeechSynthesis.h
@@ -31,12 +31,15 @@
 #ifndef InternalsSpeechSynthesis_h
 #define InternalsSpeechSynthesis_h
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 class Document;
 class Internals;
 
 class InternalsSpeechSynthesis {
+    STATIC_ONLY(InternalsSpeechSynthesis);
 public:
     static void enableMockSpeechSynthesizer(Internals&, Document*);
 };