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

Source/core/frame/SubresourceIntegrity.h

Index: Source/core/frame/SubresourceIntegrity.h
diff --git a/Source/core/frame/SubresourceIntegrity.h b/Source/core/frame/SubresourceIntegrity.h
index 705c43c3db4223a345fdfe5e74fd55d347e2f83b..1a5c3016f6f1784d87ce0babf6f9c6c240d0974a 100644
--- a/Source/core/frame/SubresourceIntegrity.h
+++ b/Source/core/frame/SubresourceIntegrity.h
@@ -7,6 +7,7 @@
 
 #include "core/CoreExport.h"
 #include "platform/Crypto.h"
+#include "wtf/Allocator.h"
 
 namespace WTF {
 class String;
@@ -20,6 +21,7 @@ class KURL;
 class Resource;
 
 class CORE_EXPORT SubresourceIntegrity {
+    STATIC_ONLY(SubresourceIntegrity);
 public:
     enum IntegrityParseResult {
         IntegrityParseValidResult,