SkRecord: increase min block to 512B, remove max.

src/core/SkRecord.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRecord_DEFINED
 #define SkRecord_DEFINED
 
@@ skipping 12 matching lines @@
 // SkRecord often looks like it's compatible with any type T, but really it's compatible with any
 // type T which has a static const SkRecords::Type kType.  That is to say, SkRecord is compatible
 // only with SkRecords::* structs defined in SkRecords.h.  Your compiler will helpfully yell if you
 // get this wrong.
 
 class SkRecord : public SkNVRefCnt<SkRecord> {
     enum {
         kFirstReserveCount = 64 / sizeof(void*),
     };
 public:
-    SkRecord() : fCount(0), fReserved(0) {}
+    SkRecord() : fCount(0), fReserved(0), fAlloc(8/*start block sizes at 256 bytes*/) {}
     ~SkRecord();
 
     // Returns the number of canvas commands in this SkRecord.
     unsigned count() const { return fCount; }
 
     // Visit the i-th canvas command with a functor matching this interface:
     //   template <typename T>
     //   R operator()(const T& record) { ... }
     // This operator() must be defined for at least all SkRecords::*.
     template <typename R, typename F>
@@ skipping 184 matching lines @@
     unsigned fReserved;
     SkAutoTMalloc<Record> fRecords;
     SkAutoTMalloc<Type8> fTypes;
     SkVarAlloc fAlloc;
     // Strangely the order of these fields matters.  If the unsigneds don't go first we're 56 bytes.
     // tomhudson and mtklein have no idea why.
 };
 SK_COMPILE_ASSERT(sizeof(SkRecord) <= 56, SkRecordSize);
 
 #endif//SkRecord_DEFINED