If Ashmem cache fails pinCache, do not reallocate.

src/lazy/SkLazyPixelRef.cpp

Index: src/lazy/SkLazyPixelRef.cpp
diff --git a/src/lazy/SkLazyPixelRef.cpp b/src/lazy/SkLazyPixelRef.cpp
index a20b3c028d0850cd80075b01225422bf30007c74..9ae22f22075d5dab30f55e931e761a16759cb6e2 100644
--- a/src/lazy/SkLazyPixelRef.cpp
+++ b/src/lazy/SkLazyPixelRef.cpp
@@ -88,6 +88,8 @@ void* SkLazyPixelRef::onLockPixels(SkColorTable**) {
     // 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;
     }