Correct data size argument type in resource loading path to unsigned

Source/web/WebSharedWorkerImpl.cpp

Index: Source/web/WebSharedWorkerImpl.cpp
diff --git a/Source/web/WebSharedWorkerImpl.cpp b/Source/web/WebSharedWorkerImpl.cpp
index 3528c27c36079272c8e562effd1b767eb353dbd3..08b40a725ce7f97847065cb4e8df980b46136238 100644
--- a/Source/web/WebSharedWorkerImpl.cpp
+++ b/Source/web/WebSharedWorkerImpl.cpp
@@ -231,8 +231,7 @@ void WebSharedWorkerImpl::loadShadowPage()
     // Construct substitute data source for the 'shadow page'. We only need it
     // to have same origin as the worker so the loading checks work correctly.
     CString content("");
-    int length = static_cast<int>(content.length());
-    RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), length));
+    RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), content.length()));
     webFrame->frame()->loader().load(FrameLoadRequest(0, ResourceRequest(m_url), SubstituteData(buffer, "text/html", "UTF-8", KURL())));
 }