Expose performance.memory in workers

Source/core/timing/MemoryInfo.h

Index: Source/core/timing/MemoryInfo.h
diff --git a/Source/core/timing/MemoryInfo.h b/Source/core/timing/MemoryInfo.h
index 218baed804ef3ee1acb7979417b1dce342399e98..6efbbcfe66849645f375054d0030f87b7acd8621 100644
--- a/Source/core/timing/MemoryInfo.h
+++ b/Source/core/timing/MemoryInfo.h
@@ -39,14 +39,14 @@
 
 namespace WebCore {
 
-class Frame;
+class ExecutionContext;
 
 class MemoryInfo : public RefCountedWillBeGarbageCollectedFinalized<MemoryInfo>, public ScriptWrappable {
     DECLARE_GC_INFO;
 public:
-    static PassRefPtrWillBeRawPtr<MemoryInfo> create(Frame* frame)
+    static PassRefPtrWillBeRawPtr<MemoryInfo> create(ExecutionContext* context)
     {
-        return adoptRefWillBeNoop(new MemoryInfo(frame));
+        return adoptRefWillBeNoop(new MemoryInfo(context));
     }
 
     size_t totalJSHeapSize() const { return m_info.totalJSHeapSize; }
@@ -56,7 +56,8 @@ public:
     void trace(Visitor*) { }
 
 private:
-    explicit MemoryInfo(Frame*);
+    explicit MemoryInfo(ExecutionContext*);
+    void loadMemoryInfo(bool);
 
     HeapInfo m_info;
 };