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

Source/core/layout/TextAutosizer.h

Index: Source/core/layout/TextAutosizer.h
diff --git a/Source/core/layout/TextAutosizer.h b/Source/core/layout/TextAutosizer.h
index 9635c0e6c0c4508f9ae9fbbfffece83c55956cfb..202efa951d2712d6cdf85b8755070cc7d948e525 100644
--- a/Source/core/layout/TextAutosizer.h
+++ b/Source/core/layout/TextAutosizer.h
@@ -52,6 +52,7 @@ class LayoutBlock;
 // http://tinyurl.com/TextAutosizer
 
 class CORE_EXPORT TextAutosizer final : public NoBaseWillBeGarbageCollectedFinalized<TextAutosizer> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(TextAutosizer);
     WTF_MAKE_NONCOPYABLE(TextAutosizer);
 public:
     static PassOwnPtrWillBeRawPtr<TextAutosizer> create(const Document* document)
@@ -80,6 +81,7 @@ public:
     };
 
     class TableLayoutScope : LayoutScope {
+        STACK_ALLOCATED();
     public:
         explicit TableLayoutScope(LayoutTable*);
     };
@@ -138,6 +140,8 @@ private:
     // belong to a supercluster will share a common multiplier and
     // text-length-based autosizing status.
     struct Supercluster {
+        WTF_MAKE_FAST_ALLOCATED(Supercluster);
+    public:
         explicit Supercluster(const BlockSet* roots)
             : m_roots(roots)
             , m_hasEnoughTextToAutosize(UnknownAmountOfText)
@@ -151,6 +155,8 @@ private:
     };
 
     struct Cluster {
+        WTF_MAKE_FAST_ALLOCATED(Cluster);
+    public:
         explicit Cluster(const LayoutBlock* root, BlockFlags flags, Cluster* parent, Supercluster* supercluster = nullptr)
             : m_root(root)
             , m_flags(flags)
@@ -186,6 +192,7 @@ private:
     };
 
     struct FingerprintSourceData {
+        STACK_ALLOCATED();
         FingerprintSourceData()
             : m_parentHash(0)
             , m_qualifiedNameHash(0)
@@ -213,6 +220,7 @@ private:
     // Fingerprints are computed during style recalc, for (some subset of)
     // blocks that will become cluster roots.
     class FingerprintMapper {
+        DISALLOW_ALLOCATION();
     public:
         void add(const LayoutObject*, Fingerprint);
         void addTentativeClusterRoot(const LayoutBlock*, Fingerprint);
@@ -233,6 +241,7 @@ private:
     };
 
     struct PageInfo {
+        DISALLOW_ALLOCATION();
         PageInfo()
             : m_frameWidth(0)
             , m_layoutWidth(0)