Remove WebURLRequest::initialize() and simplify WebURLRequest

content/renderer/fetchers/resource_fetcher_impl.cc

Index: content/renderer/fetchers/resource_fetcher_impl.cc
diff --git a/content/renderer/fetchers/resource_fetcher_impl.cc b/content/renderer/fetchers/resource_fetcher_impl.cc
index 51878491e6a3403494189701d3ba69008ed89fe2..a1a760fdc8eea30fd98334da65588a75f8fd4f70 100644
--- a/content/renderer/fetchers/resource_fetcher_impl.cc
+++ b/content/renderer/fetchers/resource_fetcher_impl.cc
@@ -122,8 +122,8 @@ void ResourceFetcherImpl::Start(
   }
   loader_->loadAsynchronously(request_, this);
 
-  // No need to hold on to the request.
-  request_.reset();
+  // No need to hold on to the request; reset it now.
+  request_ = blink::WebURLRequest();
 }
 
 void ResourceFetcherImpl::SetTimeout(const base::TimeDelta& timeout) {