Add a class to allocate small objects w/o extra calls to new.

src/core/SkSpriteBlitter.h

Index: src/core/SkSpriteBlitter.h
diff --git a/src/core/SkSpriteBlitter.h b/src/core/SkSpriteBlitter.h
index ae79afe1d8e68e6803fba7f96c62a3b41c18b77f..ea26b484cb34a3c6d6b309d23e68de56d8c8c939 100644
--- a/src/core/SkSpriteBlitter.h
+++ b/src/core/SkSpriteBlitter.h
@@ -10,8 +10,11 @@
 #ifndef SkSpriteBlitter_DEFINED
 #define SkSpriteBlitter_DEFINED
 
-#include "SkBlitter.h"
 #include "SkBitmap.h"
+#include "SkBitmapProcShader.h"
+#include "SkBlitter.h"
+#include "SkShader.h"
+#include "SkStackAllocator.h"
 
 class SkPaint;
 
@@ -32,9 +35,9 @@ public:
 #endif
 
     static SkSpriteBlitter* ChooseD16(const SkBitmap& source, const SkPaint&,
-                                      void* storage, size_t storageSize);
+                                      SkStackAllocator<kBlitterStorageByteCount>*);
     static SkSpriteBlitter* ChooseD32(const SkBitmap& source, const SkPaint&,
-                                      void* storage, size_t storageSize);
+                                      SkStackAllocator<kBlitterStorageByteCount>*);
 
 protected:
     const SkBitmap* fDevice;