remove use of malloc.h

src/core/SkVarAlloc.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkVarAlloc.h"
 
-// We use non-standard malloc diagnostic methods to make sure our allocations are sized well.
-#if defined(SK_BUILD_FOR_MAC)
-    #include <malloc/malloc.h>
-#elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_WIN32)
-    #include <malloc.h>
-#endif
-
 struct SkVarAlloc::Block {
     Block* prev;
     char* data() { return (char*)(this + 1); }
 
     static Block* Alloc(Block* prev, size_t size) {
         SkASSERT(size >= sizeof(Block));
         Block* b = (Block*)sk_malloc_throw(size);
         b->prev = prev;
         return b;
     }
@@ skipping 26 matching lines @@
     SkASSERT(SkIsAlignPtr(bytes));
 
     size_t alloc = 1<<fLgSize++;
     while (alloc < bytes + sizeof(Block)) {
         alloc *= 2;
     }
     fBytesAllocated += alloc;
     fBlock = Block::Alloc(fBlock, alloc);
     fByte = fBlock->data();
     fRemaining = alloc - sizeof(Block);
-
-#if defined(SK_BUILD_FOR_MAC)
-    SkASSERT(alloc == malloc_good_size(alloc));
-#elif defined(SK_BUILD_FOR_UNIX) && !defined(__UCLIBC__)
-    // TODO(mtklein): tune so we can assert something like this
-    //SkASSERT(alloc == malloc_usable_size(fBlock));
-#endif
 }