Expose performance.memory in workers

Source/core/timing/MemoryInfo.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/timing/MemoryInfo.h"
 
+#include "RuntimeEnabledFeatures.h"
 #include <limits>
 #include "core/frame/Frame.h"
 #include "core/frame/Settings.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/MainThread.h"
 #include "wtf/MathExtras.h"
 
 namespace WebCore {
 
 DEFINE_GC_INFO(MemoryInfo);
@@ skipping 81 matching lines @@
     }
 
     for (int i = 0; i < numberOfBuckets; ++i) {
         if (size <= bucketSizeList[i])
             return bucketSizeList[i];
     }
 
     return bucketSizeList[numberOfBuckets - 1];
 }
 
-
-MemoryInfo::MemoryInfo(Frame* frame)
+MemoryInfo::MemoryInfo()
 {
     ScriptWrappable::init(this);
-    if (!frame || !frame->settings())
-        return;
 
-    if (frame->settings()->memoryInfoEnabled()) {
+    if (RuntimeEnabledFeatures::preciseMemoryInfoEnabled()) {
         ScriptGCEvent::getHeapSize(m_info);
     } else {
         DEFINE_STATIC_LOCAL(HeapSizeCache, heapSizeCache, ());
         heapSizeCache.getCachedHeapSize(m_info);
     }
 }
 
 } // namespace WebCore