Replace uses of {un}setPendingActivity() in FetchBodyStream.

Source/modules/serviceworkers/FetchBodyStream.cpp

Index: Source/modules/serviceworkers/FetchBodyStream.cpp
diff --git a/Source/modules/serviceworkers/FetchBodyStream.cpp b/Source/modules/serviceworkers/FetchBodyStream.cpp
index 6fa418fa56aaf1c5eba35fb8e6656fafa4fe4b82..1798b0e532142179a611d52f0fe5c40585687cd0 100644
--- a/Source/modules/serviceworkers/FetchBodyStream.cpp
+++ b/Source/modules/serviceworkers/FetchBodyStream.cpp
@@ -20,7 +20,7 @@ namespace WebCore {
 
 PassRefPtrWillBeRawPtr<FetchBodyStream> FetchBodyStream::create(ExecutionContext* context, PassRefPtr<BlobDataHandle> blobDataHandle)
 {
-    RefPtrWillBeRawPtr<FetchBodyStream> fetchBodyStream(adoptRefWillBeRefCountedGarbageCollected(new FetchBodyStream(context, blobDataHandle)));
+    RefPtrWillBeRawPtr<FetchBodyStream> fetchBodyStream(adoptRefWillBeNoop(new FetchBodyStream(context, blobDataHandle)));
     fetchBodyStream->suspendIfNeeded();
     return fetchBodyStream.release();
 }
@@ -58,7 +58,6 @@ ScriptPromise FetchBodyStream::readAsync(ScriptState* scriptState, ResponseType
         ASSERT_NOT_REACHED();
     }
 
-    setPendingActivity(this);
     m_loader = adoptPtr(new FileReaderLoader(readType, this));
     m_loader->start(scriptState->executionContext(), m_blobDataHandle);
 
@@ -97,6 +96,11 @@ void FetchBodyStream::stop()
         m_loader->cancel();
 }
 
+bool FetchBodyStream::hasPendingActivity() const
+{
+    return m_resolver;
+}
+
 FetchBodyStream::FetchBodyStream(ExecutionContext* context, PassRefPtr<BlobDataHandle> blobDataHandle)
     : ActiveDOMObject(context)
     , m_blobDataHandle(blobDataHandle)
@@ -149,8 +153,6 @@ void FetchBodyStream::didFinishLoading()
         ASSERT_NOT_REACHED();
     }
     m_resolver.clear();
-    unsetPendingActivity(this);
-    return;
 }
 
 void FetchBodyStream::didFail(FileError::ErrorCode code)
@@ -158,7 +160,6 @@ void FetchBodyStream::didFail(FileError::ErrorCode code)
     ASSERT(m_resolver);
     m_resolver->resolve("");
     m_resolver.clear();
-    unsetPendingActivity(this);
 }
 
 } // namespace WebCore