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

Source/modules/fetch/DataConsumerHandleUtil.h

Index: Source/modules/fetch/DataConsumerHandleUtil.h
diff --git a/Source/modules/fetch/DataConsumerHandleUtil.h b/Source/modules/fetch/DataConsumerHandleUtil.h
index 1cd84803b2de26e4e2bb683fa640282aaf028438..229aa5b7a18fe3b44241c3426591265957561b3a 100644
--- a/Source/modules/fetch/DataConsumerHandleUtil.h
+++ b/Source/modules/fetch/DataConsumerHandleUtil.h
@@ -8,6 +8,7 @@
 #include "modules/ModulesExport.h"
 #include "modules/fetch/FetchDataConsumerHandle.h"
 #include "public/platform/WebDataConsumerHandle.h"
+#include "wtf/Allocator.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/WeakPtr.h"
 
@@ -33,6 +34,7 @@ MODULES_EXPORT PassOwnPtr<FetchDataConsumerHandle> createFetchDataConsumerHandle
 // NotifyOnReaderCreationHelper must be owned by a reader and
 // |client| must be the client of the reader.
 class NotifyOnReaderCreationHelper final {
+    DISALLOW_ALLOCATION();
 public:
     NotifyOnReaderCreationHelper(WebDataConsumerHandle::Client* /* client */);