Deprecate URL.createObjectURL/revokeObjectURL in Service Workers

third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp

Index: third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp
diff --git a/third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp b/third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp
index 8f10116f5b25c89907e2bc90f05b3842895cbf5f..d552d043670140bc0a7452ad28041fa289c52861 100644
--- a/third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/URLMediaStream.cpp
@@ -31,6 +31,8 @@
 #include "modules/mediastream/URLMediaStream.h"
 
 #include "core/dom/DOMURL.h"
+#include "core/frame/Deprecation.h"
+#include "core/frame/UseCounter.h"
 #include "modules/mediastream/MediaStream.h"
 
 namespace blink {
@@ -40,6 +42,9 @@ String URLMediaStream::createObjectURL(ExecutionContext* executionContext, Media
     // Since WebWorkers cannot obtain Stream objects, we should be on the main thread.
     DCHECK(isMainThread());
 
+    if (executionContext && executionContext->isServiceWorkerGlobalScope())
+        Deprecation::countDeprecation(executionContext, UseCounter::URLMethodCreateObjectURLServiceWorker);
+
     if (!executionContext || !stream)
         return String();
     return DOMURL::createPublicURL(executionContext, stream);