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

Source/core/html/track/vtt/VTTScanner.h

 /*
  * Copyright (c) 2013, Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef VTTScanner_h
 #define VTTScanner_h
 
 #include "core/CoreExport.h"
 #include "platform/ParsingUtilities.h"
+#include "wtf/Allocator.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 // Helper class for "scanning" an input string and performing parsing of
 // "micro-syntax"-like constructs.
 //
 // There's two primary operations: match and scan.
 //
 // The 'match' operation matches an explicitly or implicitly specified sequence
 // against the characters ahead of the current input pointer, and returns true
 // if the sequence can be matched.
 //
 // The 'scan' operation performs a 'match', and if the match is successful it
 // advance the input pointer past the matched sequence.
 class CORE_EXPORT VTTScanner {
+    STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(VTTScanner);
 public:
     explicit VTTScanner(const String& line);
 
     typedef const LChar* Position;
 
     class Run {
+        STACK_ALLOCATED();
     public:
         Run(Position start, Position end, bool is8Bit)
             : m_start(start), m_end(end), m_is8Bit(is8Bit) { }
 
         Position start() const { return m_start; }
         Position end() const { return m_end; }
 
         bool isEmpty() const { return m_start == m_end; }
         size_t length() const;
 
@@ skipping 160 matching lines @@
     ASSERT(position() < end());
     if (m_is8Bit)
         m_data.characters8 += amount;
     else
         m_data.characters16 += amount;
 }
 
 }
 
 #endif