Support deprecation warnings in shared/service workers

Source/core/workers/WorkerGlobalScope.h

Index: Source/core/workers/WorkerGlobalScope.h
diff --git a/Source/core/workers/WorkerGlobalScope.h b/Source/core/workers/WorkerGlobalScope.h
index f39fa96d41e7d6c665fe5ecbdd5afb9f283560f6..21efaf2693a4258f01cff7ad4ed91f621bf4d245 100644
--- a/Source/core/workers/WorkerGlobalScope.h
+++ b/Source/core/workers/WorkerGlobalScope.h
@@ -39,6 +39,7 @@
 #include "platform/heap/Handle.h"
 #include "platform/network/ContentSecurityPolicyParsers.h"
 #include "wtf/Assertions.h"
+#include "wtf/BitVector.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
@@ -159,6 +160,8 @@ private:
     mutable RefPtrWillBeMember<WorkerLocation> m_location;
     mutable RefPtrWillBeMember<WorkerNavigator> m_navigator;
 
+    mutable OwnPtr<BitVector> m_deprecationWarningBits;

[sof, 2015/02/05 08:48:18]

Did you consider factoring UseCounter a bit so as to allow sharing of
representation & recording of measurements? That would also allow inspector to
hook into its support for muting.

[Kunihiko Sakamoto, 2015/02/05 10:35:37]

Factored it to UseCounter::CountBits class.

+
     OwnPtr<WorkerScriptController> m_script;
     WorkerThread* m_thread;