Cap SkVarAlloc's desired block at 64K.

src/core/SkVarAlloc.cpp

 #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_LINUX)
     #include <malloc.h>
 #endif
 
 struct SkVarAlloc::Block {
@@ skipping 19 matching lines @@
     while (b) {
         Block* prev = b->prev;
         sk_free(b);
         b = prev;
     }
 }
 
 void SkVarAlloc::makeSpace(size_t bytes, unsigned flags) {
     SkASSERT(SkIsAlignPtr(bytes));
 
-    size_t alloc = 1<<(fLgMinSize++);
+    size_t alloc = 1<<fLgMinSize;
     while (alloc < bytes + sizeof(Block)) {
         alloc *= 2;
     }
     fBlock = Block::Alloc(fBlock, alloc, flags);
     fByte = fBlock->data();
     fRemaining = alloc - sizeof(Block);
 
+    if (fLgMinSize < 16) {

[reed1, 2014/11/13 21:40:07]

please add comment + possible a #define with a comment

+        fLgMinSize++;
+    }
+
 #if defined(SK_BUILD_FOR_MAC)
     SkASSERT(alloc == malloc_good_size(alloc));
 #elif defined(SK_BUILD_FOR_LINUX)
     SkASSERT(alloc == malloc_usable_size(fByte - sizeof(Block)));
 #endif
 }