Clean up SkScaledImageCache at exit only in SK_DEVELOPER mode.

src/core/SkScaledImageCache.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkScaledImageCache.h"
 #include "SkMipMap.h"
 #include "SkPixelRef.h"
@@ skipping 652 matching lines @@
              fCount, fBytesUsed, locked,
              fDiscardableFactory ? "discardable" : "malloc");
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "SkThread.h"
 
 SK_DECLARE_STATIC_MUTEX(gMutex);
 static SkScaledImageCache* gScaledImageCache = NULL;
-static void cleanup_gScaledImageCache() { SkDELETE(gScaledImageCache); }
+static void cleanup_gScaledImageCache() {
+    // We'll clean this up in our own tests, but disable for clients.
+    // Chrome seems to have funky multi-process things going on in unit tests that
+    // makes this unsafe to delete when the main process atexit()s.
+    // SkLazyPtr does the same sort of thing.
+#if SK_DEVELOPER
+    SkDELETE(gScaledImageCache);
+#endif
+}
 
 /** Must hold gMutex when calling. */
 static SkScaledImageCache* get_cache() {
     // gMutex is always held when this is called, so we don't need to be fancy in here.
     gMutex.assertHeld();
     if (NULL == gScaledImageCache) {
 #ifdef SK_USE_DISCARDABLE_SCALEDIMAGECACHE
         gScaledImageCache = SkNEW_ARGS(SkScaledImageCache, (SkDiscardableMemory::Create));
 #else
         gScaledImageCache = SkNEW_ARGS(SkScaledImageCache, (SK_DEFAULT_IMAGE_CACHE_LIMIT));
@@ skipping 91 matching lines @@
     return SkScaledImageCache::GetBytesUsed();
 }
 
 size_t SkGraphics::GetImageCacheByteLimit() {
     return SkScaledImageCache::GetByteLimit();
 }
 
 size_t SkGraphics::SetImageCacheByteLimit(size_t newLimit) {
     return SkScaledImageCache::SetByteLimit(newLimit);
 }