If Ashmem cache fails pinCache, do not reallocate.

src/lazy/SkLazyPixelRef.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Sk64.h"
 #include "SkLazyPixelRef.h"
 #include "SkColorTable.h"
@@ skipping 70 matching lines @@
 #if LAZY_CACHE_STATS
         sk_atomic_inc(&gCacheMisses);
 #endif
     }
     SkASSERT(NULL == target.fAddr);
     SkImage::Info info;
     SkASSERT(fData != NULL && fData->size() > 0);
     // FIXME: As an optimization, only do this part once.
     fErrorInDecoding = !fDecodeProc(fData->data(), fData->size(), &info, NULL);
     if (fErrorInDecoding) {
+        // In case a previous call to allocAndPinCache succeeded.
+        fImageCache->throwAwayCache(fCacheId);
         fCacheId = SkImageCache::UNINITIALIZED_ID;
         return NULL;
     }
     // Allocate the memory.
     size_t bytes = ComputeMinRowBytesAndSize(info, &target.fRowBytes);
 
     target.fAddr = fImageCache->allocAndPinCache(bytes, &fCacheId);
     if (NULL == target.fAddr) {
         // Space could not be allocated.
         fCacheId = SkImageCache::UNINITIALIZED_ID;
@@ skipping 15 matching lines @@
     }
     if (fCacheId != SkImageCache::UNINITIALIZED_ID) {
         fImageCache->releaseCache(fCacheId);
     }
 }
 
 SkData* SkLazyPixelRef::onRefEncodedData() {
     fData->ref();
     return fData;
 }