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

Source/core/html/parser/BackgroundHTMLInputStream.h

Index: Source/core/html/parser/BackgroundHTMLInputStream.h
diff --git a/Source/core/html/parser/BackgroundHTMLInputStream.h b/Source/core/html/parser/BackgroundHTMLInputStream.h
index 4bd302357b87cbb3725d133f2eb80faa812100dc..7044f99350d6d5954700d7bfe8c834639f8d220a 100644
--- a/Source/core/html/parser/BackgroundHTMLInputStream.h
+++ b/Source/core/html/parser/BackgroundHTMLInputStream.h
@@ -27,6 +27,7 @@
 #define BackgroundHTMLInputStream_h
 
 #include "platform/text/SegmentedString.h"
+#include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
@@ -35,6 +36,7 @@ namespace blink {
 typedef size_t HTMLInputCheckpoint;
 
 class BackgroundHTMLInputStream {
+    DISALLOW_ALLOCATION();
     WTF_MAKE_NONCOPYABLE(BackgroundHTMLInputStream);
 public:
     BackgroundHTMLInputStream();